| sec | (adjective) (of champagne) moderately dry | Synonyms: unsweet |
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| (noun) ratio of the hypotenuse to the adjacent side of a right-angled triangle | Synonyms: secant |
| (noun) 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites | Synonyms: s, second |
| secant | (noun) ratio of the hypotenuse to the adjacent side of a right-angled triangle | Synonyms: sec |
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| (noun) a straight line that intersects a curve at two or more points | - |
| secateurs | (noun) small pruning shears with a spring that holds the handles open and a single blade that closes against a flat surface | - |
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| secede | (verb) withdraw from an organization or communion | Synonyms: break away, splinter |
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| secern | (verb) mark as different | Synonyms: differentiate, distinguish, secernate, separate, severalise, severalize, tell, tell apart |
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| secernate | (verb) mark as different | Synonyms: differentiate, distinguish, secern, separate, severalise, severalize, tell, tell apart |
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| secernment | (noun) the cognitive process whereby two or more stimuli are distinguished | Synonyms: discrimination |
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| (noun) the organic process of synthesizing and releasing some substance | Synonyms: secretion |
| secession | (noun) formal separation from an alliance or federation | Synonyms: withdrawal |
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| (noun) an Austrian school of art and architecture parallel to the French art nouveau in the 1890s | Synonyms: sezession |
| secessionism | (noun) a doctrine that maintains the right of secession | - |
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| secessionist | (noun) an advocate of secessionism | - |
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| seckel | (noun) small yellowish- to reddish-brown pear | Synonyms: seckel pear |
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| seclude | (verb) keep away from others | Synonyms: sequester, sequestrate, withdraw |
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| secluded | (adjective) hidden from general view or use | Synonyms: privy, secret |
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| (adjective) providing privacy or seclusion | Synonyms: cloistered, reclusive, sequestered |
| seclusion | (noun) the act of secluding yourself from others | - |
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| (noun) the quality of being secluded from the presence or view of others | Synonyms: privacy, privateness |
| secobarbital | (noun) barbiturate that is a white odorless slightly bitter powder (trade name Seconal) used as a sodium salt for sedation and to treat convulsions | Synonyms: red devil, secobarbital sodium, Seconal |
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| second | (adjective) a part or voice or instrument or orchestra section lower in pitch than or subordinate to the first | - |
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| (adjective) coming next after the first in position in space or time or degree or magnitude | Synonyms: 2d, 2nd |
| (noun) the fielding position of the player on a baseball team who is stationed near the second of the bases in the infield | Synonyms: second base |
| (noun) the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle | Synonyms: second gear |
| (noun) merchandise that has imperfections; usually sold at a reduced price without the brand name | Synonyms: irregular |
| (noun) a speech seconding a motion | Synonyms: endorsement, indorsement, secondment |
| (noun) the official attendant of a contestant in a duel or boxing match | - |
| (noun) a 60th part of a minute of arc | Synonyms: arcsecond |
| (noun) following the first in an ordering or series | - |
| (noun) 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites | Synonyms: s, sec |
| (noun) an indefinitely short time | Synonyms: bit, minute, mo, moment |
| (noun) a particular point in time | Synonyms: instant, minute, moment |
| (adverb) in the second place | Synonyms: secondly |
| (verb) give support or one's approval to | Synonyms: back, endorse, indorse |
| (verb) transfer an employee to a different, temporary assignment | - |
| secondarily | (adverb) of secondary import | - |
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| secondary | (adjective) being of second rank or importance or value; not direct or immediate | - |
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| (adjective) depending on or incidental to what is original or primary | - |
| (adjective) inferior in rank or status | Synonyms: junior-grade, lower-ranking, lowly, petty, subaltern |
| (adjective) not of major importance | - |
| (adjective) belonging to a lower class or rank | - |
| (noun) coil such that current is induced in it by passing a current through the primary coil | Synonyms: secondary coil, secondary winding |
| (noun) the defensive football players who line up behind the linemen | - |
| seconder | (noun) someone who endorses a motion or petition as a necessary preliminary to a discussion or vote | - |
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| secondhand | (adjective) previously used or owned by another | Synonyms: used |
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| (adjective) derived from what is primary or original; not firsthand | - |
| (adverb) by indirect means | - |
| secondly | (adverb) in the second place | Synonyms: second |
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| secondment | (noun) the detachment of a person from their regular organization for temporary assignment elsewhere | - |
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| (noun) a speech seconding a motion | Synonyms: endorsement, indorsement, second |
| secondo | (noun) the second or lower part of a duet (especially a piano duet) | - |
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| secpar | (noun) a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years | Synonyms: parsec |
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| secrecy | (noun) the trait of keeping things secret | Synonyms: secretiveness, silence |
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| (noun) the condition of being concealed or hidden | Synonyms: concealment, privacy, privateness |
| secret | (adjective) the next to highest level of official classification for documents | - |
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| (adjective) not open or public; kept private or not revealed | - |
| (adjective) having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding | Synonyms: mysterious, mystic, mystical, occult, orphic |
| (adjective) not expressed | Synonyms: private |
| (adjective) (of information) given in confidence or in secret | Synonyms: confidential |
| (adjective) not openly made known | Synonyms: unavowed |
| (adjective) conducted with or marked by hidden aims or methods | Synonyms: clandestine, cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, surreptitious, undercover, underground |
| (adjective) designed to elude detection | Synonyms: hidden |
| (adjective) indulging only covertly | - |
| (adjective) hidden from general view or use | Synonyms: privy, secluded |
| (adjective) communicated covertly | - |
| (noun) something that baffles understanding and cannot be explained | Synonyms: closed book, enigma, mystery |
| (noun) something that should remain hidden from others (especially information that is not to be passed on) | - |
| (noun) information known only to a special group | Synonyms: arcanum |
| secretaire | (noun) a desk used for writing | Synonyms: escritoire, secretary, writing table |
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| secretarial | (adjective) of or relating to a secretary or to a secretary's work | - |
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| secretariat | (noun) an administrative unit responsible for maintaining records and other secretarial duties; especially for international organizations | Synonyms: secretariate |
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| secretariate | (noun) an administrative unit responsible for maintaining records and other secretarial duties; especially for international organizations | Synonyms: secretariat |
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| secretary | (noun) a desk used for writing | Synonyms: escritoire, secretaire, writing table |
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| (noun) an assistant who handles correspondence and clerical work for a boss or an organization | Synonyms: secretarial assistant |
| (noun) a person who is head of an administrative department of government | - |
| (noun) a person to whom a secret is entrusted | Synonyms: repository |
| secretaryship | (noun) the position of secretary | - |
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| secretase | (noun) a set of enzymes believed to snip pieces off a longer protein producing fragments of amyloid protein that bunch up and create amyloid protein plaques in brain tissue (the pathological hallmark of Alzheimer's) | - |
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| secrete | (verb) generate and separate from cells or bodily fluids | Synonyms: release |
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| (verb) place out of sight; keep secret | - |
| secreter | (noun) any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream | Synonyms: gland, secretor, secretory organ |
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| secretin | (noun) a gastrointestinal hormone that stimulates the secretion of water and bicarbonate from the pancreas and bile ducts whenever the stomach empties too much acid into the small intestine | - |
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| secretion | (noun) a functionally specialized substance (especially one that is not a waste) released from a gland or cell | - |
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| (noun) the organic process of synthesizing and releasing some substance | Synonyms: secernment |
| secretive | (adjective) inclined to secrecy or reticence about divulging information | Synonyms: close, closelipped, closemouthed, tightlipped |
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| secretively | (adverb) in a secretive manner; with a preference for secrecy | - |
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| secretiveness | (noun) characterized by a lack of openness (especially about one's actions or purposes) | Synonyms: closeness |
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| (noun) the trait of keeping things secret | Synonyms: secrecy, silence |
| secretly | (adverb) in secrecy; not openly | Synonyms: in secret, on the Q.T., on the QT |
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| (adverb) not openly; inwardly | - |
| secretor | (noun) any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream | Synonyms: gland, secreter, secretory organ |
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| secretory | (adjective) of or relating to or producing a secretion | - |
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| sect | (noun) a dissenting clique | Synonyms: faction |
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| (noun) a subdivision of a larger religious group | Synonyms: religious order, religious sect |
| sectarian | (adjective) of or relating to or characteristic of a sect or sects | - |
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| (noun) a member of a sect | Synonyms: sectarist, sectary |
| sectarianism | (noun) a narrow-minded adherence to a particular sect or party or denomination | Synonyms: denominationalism |
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| sectarist | (noun) a member of a sect | Synonyms: sectarian, sectary |
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| sectary | (noun) a member of a sect | Synonyms: sectarian, sectarist |
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| section | (noun) the cutting of or into body tissues or organs (especially by a surgeon as part of an operation) | Synonyms: incision, surgical incision |
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| (noun) one of several parts or pieces that fit with others to constitute a whole object | Synonyms: segment |
| (noun) one of the portions into which something is regarded as divided and which together constitute a whole | Synonyms: division, part |
| (noun) a self-contained part of a larger composition (written or musical) | Synonyms: subdivision |
| (noun) a segment of a citrus fruit | - |
| (noun) a small army unit usually having a special function | - |
| (noun) a division of an orchestra containing all instruments of the same class | - |
| (noun) a small team of policemen working as part of a police platoon | - |
| (noun) a specialized division of a large organization | Synonyms: department |
| (noun) a small class of students who are part of a larger course but are taught separately | Synonyms: discussion section |
| (noun) (geometry) the area created by a plane cutting through a solid | Synonyms: plane section |
| (noun) a distinct region or subdivision of a territorial or political area or community or group of people | - |
| (noun) a very thin slice (of tissue or mineral or other substance) for examination under a microscope | - |
| (noun) a land unit equal to 1 square mile | - |
| (verb) divide into segments | Synonyms: segment |
| sectional | (adjective) relating to or based upon a section (i.e. as if cut through by an intersecting plane) | - |
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| (adjective) consisting of or divided into sections | Synonyms: sectioned |
| (adjective) related or limited to a distinct region or subdivision of a territory or community or group of people | - |
| (noun) a piece of furniture made up of sections that can be arranged individually or together | - |
| sectionalisation | (noun) the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart | Synonyms: division, partition, partitioning, sectionalization, segmentation |
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| sectionalise | (verb) divide into sections, especially into geographic sections | Synonyms: sectionalize |
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| sectionalism | (noun) a partiality for some particular place | Synonyms: localism, provincialism |
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| sectionalization | (noun) the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart | Synonyms: division, partition, partitioning, sectionalisation, segmentation |
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| sectionalize | (verb) divide into sections, especially into geographic sections | Synonyms: sectionalise |
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| sectioned | (adjective) consisting of or divided into sections | Synonyms: sectional |
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| sector | (noun) measuring instrument consisting of two graduated arms hinged at one end | - |
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| (noun) a particular aspect of life or activity | Synonyms: sphere |
| (noun) a social group that forms part of the society or the economy | - |
| (noun) a portion of a military position | - |
| (noun) the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes | - |
| (noun) a plane figure bounded by two radii and the included arc of a circle | - |
| sectorial | (adjective) relating to or resembling a sector | - |
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| secular | (adjective) of or relating to clergy not bound by monastic vows | - |
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| (adjective) not concerned with or devoted to religion | Synonyms: profane |
| (adjective) characteristic of or devoted to the temporal world as opposed to the spiritual world | Synonyms: temporal, worldly |
| (adjective) of or relating to the doctrine that rejects religion and religious considerations | - |
| (adjective) characteristic of those who are not members of the clergy | Synonyms: laic, lay |
| (noun) someone who is not a clergyman or a professional person | Synonyms: layman, layperson |
| secularisation | (noun) transfer of property from ecclesiastical to civil possession | Synonyms: secularization |
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| (noun) the activity of changing something (art or education or society or morality etc.) so it is no longer under the control or influence of religion | Synonyms: secularization |
| secularise | (verb) make secular and draw away from a religious orientation | Synonyms: secularize |
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| secularism | (noun) a doctrine that rejects religion and religious considerations | - |
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| secularist | (noun) an advocate of secularism; someone who believes that religion should be excluded from government and education | - |
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| secularization | (noun) transfer of property from ecclesiastical to civil possession | Synonyms: secularisation |
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| (noun) the activity of changing something (art or education or society or morality etc.) so it is no longer under the control or influence of religion | Synonyms: secularisation |
| secularize | (verb) make secular and draw away from a religious orientation | Synonyms: secularise |
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| (verb) transfer from ecclesiastical to civil possession, use, or control | Synonyms: desacralize |
| secundigravida | (noun) a woman who is pregnant for the second time | Synonyms: gravida II |
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| secure | (adjective) free from fear or doubt; easy in mind | Synonyms: unafraid, untroubled |
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| (adjective) free from danger or risk | - |
| (adjective) not likely to fail or give way | - |
| (adjective) immune to attack; incapable of being tampered with | Synonyms: impregnable, inviolable, strong, unassailable, unattackable |
| (adjective) financially safe | Synonyms: dependable, good, safe |
| (verb) make certain of | Synonyms: assure, ensure, guarantee, insure |
| (verb) cause to be firmly attached | Synonyms: fasten, fix |
| (verb) fill or close tightly with or as if with a plug | Synonyms: plug, stop up |
| (verb) furnish with battens | Synonyms: batten, batten down |
| (verb) get by special effort | Synonyms: procure |
| (verb) assure payment of | - |
| securely | (adverb) in a secure manner; in a manner free from danger | Synonyms: firmly |
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| (adverb) in an invulnerable manner | - |
| (adverb) in a manner free from fear or risk | - |
| (adverb) in a confident and unselfconscious manner | - |
| secureness | (noun) the quality of being fixed in place as by some firm attachment | Synonyms: fastness, fixedness, fixity, fixture |
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| (noun) the state of freedom from fear or danger | - |
| securer | (noun) someone who obtains or acquires | Synonyms: procurer |
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| security | (noun) measures taken as a precaution against theft or espionage or sabotage etc. | Synonyms: security measures |
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| (noun) an electrical device that sets off an alarm when someone tries to break in | Synonyms: security measure, security system |
| (noun) a guarantee that an obligation will be met | Synonyms: surety |
| (noun) freedom from anxiety or fear | - |
| (noun) a department responsible for the security of the institution's property and workers | Synonyms: security department |
| (noun) property that your creditor can claim in case you default on your obligation | Synonyms: surety |
| (noun) defense against financial failure; financial independence | Synonyms: protection |
| (noun) a formal declaration that documents a fact of relevance to finance and investment; the holder has a right to receive interest or dividends | Synonyms: certificate |
| (noun) the state of being free from danger or injury | - |