| pin | (noun) a small slender (often pointed) piece of wood or metal used to support or fasten or attach things | - |
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| (noun) a piece of jewelry that is pinned onto the wearer's garment | - |
| (noun) axis consisting of a short shaft that supports something that turns | Synonyms: pivot |
| (noun) a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing | Synonyms: oarlock, peg, rowlock, thole, tholepin |
| (noun) a club-shaped wooden object used in bowling; set up in triangular groups of ten as the target | Synonyms: bowling pin |
| (noun) flagpole used to mark the position of the hole on a golf green | Synonyms: flag |
| (noun) cylindrical tumblers consisting of two parts that are held in place by springs; when they are aligned with a key the bolt can be thrown | Synonyms: pin tumbler |
| (noun) informal terms for the leg | Synonyms: peg, stick |
| (noun) small markers inserted into a surface to mark scores or define locations etc. | Synonyms: peg |
| (noun) when a wrestler's shoulders are forced to the mat | Synonyms: fall |
| pinafore | (noun) a sleeveless dress resembling an apron; worn over other clothing | Synonyms: jumper, pinny |
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| pinata | (noun) plaything consisting of a container filled with toys and candy; suspended from a height for blindfolded children to break with sticks | - |
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| pinball | (noun) a game played on a sloping board; the object is to propel marbles against pins or into pockets | Synonyms: pinball game |
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| pincer | (noun) a grasping structure on the limb of a crustacean or other arthropods | Synonyms: chela, claw, nipper |
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| (noun) a hand tool for holding consisting of a compound lever for grasping | Synonyms: pair of pincers, pair of tweezers, tweezer |
| pinch | (noun) a squeeze with the fingers | Synonyms: tweak |
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| (noun) the act of apprehending (especially apprehending a criminal) | Synonyms: apprehension, arrest, catch, collar, taking into custody |
| (noun) a small sharp bite or snip | Synonyms: nip |
| (noun) a sudden unforeseen crisis (usually involving danger) that requires immediate action | Synonyms: emergency, exigency |
| (noun) a slight but appreciable amount | Synonyms: hint, jot, mite, soupcon, speck, tinge, touch |
| (noun) an injury resulting from getting some body part squeezed | - |
| (noun) a painful or straitened circumstance | - |
| pinchbeck | (noun) an alloy of copper and zinc that is used in cheap jewelry to imitate gold | - |
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| pinche | (noun) South American tamarin with a tufted head | Synonyms: Leontocebus oedipus |
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| pinchgut | (noun) a niggardly person who starves himself (and others) | - |
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| pincushion | (noun) a small stiff cushion into which pins are stuck ready for use | - |
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| pindolol | (noun) an oral beta blocker (trade name Visken) used in treating hypertension | Synonyms: Visken |
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| pine | (noun) a coniferous tree | Synonyms: pine tree, true pine |
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| (noun) straight-grained durable and often resinous white to yellowish timber of any of numerous trees of the genus Pinus | - |
| pinealoma | (noun) tumor of the pineal gland | - |
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| pineapple | (noun) large sweet fleshy tropical fruit with a terminal tuft of stiff leaves; widely cultivated | Synonyms: ananas |
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| (noun) a tropical American plant bearing a large fleshy edible fruit with a terminal tuft of stiff leaves; widely cultivated in the tropics | Synonyms: Ananas comosus, pineapple plant |
| pinecone | (noun) the seed-producing cone of a pine tree | - |
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| pinesap | (noun) fleshy tawny or reddish saprophytic herb resembling the Indian pipe and growing in woodland humus of eastern North America; in some classifications placed in a separate genus Hypopitys | Synonyms: false beachdrops, Monotropa hypopithys |
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| pinetum | (noun) an area planted with pine trees or related conifers | - |
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| pineweed | (noun) annual wiry-stemmed North American weed with minute scalelike leaves and small yellow flowers | Synonyms: Hypericum gentianoides, nitweed, orange grass, pine-weed |
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| pinfish | (noun) similar to sea bream; small spiny-finned fish found in bays along the southeastern coast of the United States | Synonyms: Lagodon rhomboides, sailor's-choice, squirrelfish |
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| pinfold | (noun) a pen where stray animals are confined | - |
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| ping | (noun) a sharp high-pitched resonant sound (as of a sonar echo or a bullet striking metal) | - |
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| pinger | (noun) a pulse generator used for echo sounding in sonar | - |
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| pinguecula | (noun) a slightly elevated elastic tissue deposit in the conjunctiva that may extend to the cornea but does not cover it | - |
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| pinhead | (noun) the head of a pin | - |
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| (noun) an ignorant or foolish person | Synonyms: boob, booby, dope, dumbbell, dummy |
| pinhole | (noun) a small puncture that might have been made by a pin | - |
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| pining | (noun) a feeling of deep longing | - |
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| pinion | (noun) wing of a bird | Synonyms: pennon |
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| (noun) any of the larger wing or tail feathers of a bird | Synonyms: flight feather, quill, quill feather |
| (noun) a gear with a small number of teeth designed to mesh with a larger wheel or rack | - |
| pinite | (noun) grey or green or brown mineral similar to mica and containing aluminum and potassium sulphates | - |
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| pink | (noun) a light shade of red | - |
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| (noun) a person with mildly leftist political views | Synonyms: pinko |
| (noun) any of various flowers of plants of the genus Dianthus cultivated for their fragrant flowers | Synonyms: garden pink |
| pinkeye | (noun) inflammation of the conjunctiva of the eye | Synonyms: conjunctivitis |
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| pinkie | (noun) the finger farthest from the thumb | Synonyms: little finger, pinky |
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| pinkness | (noun) the quality of being pink | - |
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| pinko | (noun) a person with mildly leftist political views | Synonyms: pink |
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| pinkroot | (noun) a fungal disease of onions | - |
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| pinky | (noun) the finger farthest from the thumb | Synonyms: little finger, pinkie |
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| pinna | (noun) the externally visible cartilaginous structure of the external ear | Synonyms: auricle, ear |
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| (noun) division of a usually pinnately divided leaf | Synonyms: pinnule |
| pinnace | (noun) a boat for communication between ship and shore | Synonyms: cutter, ship's boat, tender |
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| pinnacle | (noun) (architecture) a slender upright spire at the top of a buttress or tower | - |
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| (noun) a lofty peak | - |
| (noun) the highest level or degree attainable; the highest stage of development | Synonyms: acme, elevation, height, meridian, peak, summit, superlative, tiptop, top |
| pinnatiped | (noun) aquatic carnivorous mammal having a streamlined body specialized for swimming with limbs modified as flippers | Synonyms: pinniped, pinniped mammal |
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| pinner | (noun) a woman's cap with two long flaps pinned on | - |
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| pinning | (noun) a mutual promise of a couple not to date anyone else; on college campuses it was once signaled by the giving of a fraternity pin | - |
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| pinniped | (noun) aquatic carnivorous mammal having a streamlined body specialized for swimming with limbs modified as flippers | Synonyms: pinnatiped, pinniped mammal |
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| pinnule | (noun) division of a usually pinnately divided leaf | Synonyms: pinna |
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| pinny | (noun) a sleeveless dress resembling an apron; worn over other clothing | Synonyms: jumper, pinafore |
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| pinochle | (noun) a card game played with a pack of forty-eight cards (two of each suit for high cards); play resembles whist | Synonyms: bezique, penuchle, pinocle |
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| pinocle | (noun) a card game played with a pack of forty-eight cards (two of each suit for high cards); play resembles whist | Synonyms: bezique, penuchle, pinochle |
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| pinocytosis | (noun) process by which certain cells can engulf and incorporate droplets of fluid | - |
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| pinole | (noun) meal made of finely ground corn mixed with sugar and spices | - |
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| pinon | (noun) any of several low-growing pines of western North America | Synonyms: pinyon |
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| pinpoint | (noun) the sharp point of a pin | - |
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| (noun) a very small spot | Synonyms: speck |
| (noun) a very brief moment | - |
| pinprick | (noun) small puncture (as if made by a pin) | - |
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| (noun) a minor annoyance | - |
| pinscher | (noun) any of three breeds of dogs whose ears and tail are usually cropped | - |
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| pinstripe | (noun) a very thin stripe (especially a white stripe on a dark fabric) | - |
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| (noun) a fabric with very thin stripes | - |
| (noun) a suit made from a fabric with very thin stripes | - |
| pint | (noun) a United States liquid unit equal to 16 fluid ounces; two pints equal one quart | - |
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| (noun) a British imperial capacity measure (liquid or dry) equal to 4 gills or 568.26 cubic centimeters | - |
| (noun) a United States dry unit equal to 0.5 quart or 33.6 cubic inches | Synonyms: dry pint |
| pintado | (noun) large edible mackerel of temperate United States coastal Atlantic waters | Synonyms: cero, kingfish, Scomberomorus regalis |
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| pintail | (noun) long-necked river duck of the Old and New Worlds having elongated central tail feathers | Synonyms: Anas acuta, pin-tailed duck |
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| pintle | (noun) a pin or bolt forming the pivot of a hinge | - |
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| pinto | (noun) a spotted or calico horse or pony | - |
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| pinwheel | (noun) a circular firework that spins round and round emitting colored fire | Synonyms: catherine wheel |
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| (noun) a toy consisting of vanes of colored paper or plastic that is pinned to a stick and spins when it is pointed into the wind | Synonyms: pinwheel wind collector |
| (noun) a wheel that has numerous pins that are set at right angles to its rim | - |
| (noun) perennial subshrub of Tenerife having leaves in rosettes resembling pinwheels | Synonyms: Aeonium haworthii |
| pinworm | (noun) small threadlike worm infesting human intestines and rectum especially in children | Synonyms: Enterobius vermicularis, threadworm |
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| pinyon | (noun) any of several low-growing pines of western North America | Synonyms: pinon |
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