| light | (adjective) of comparatively little physical weight or density | - |
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| (adjective) psychologically light; especially free from sadness or troubles | - |
| (adjective) not great in degree or quantity or number | - |
| (adjective) of the military or industry; using (or being) relatively small or light arms or equipment | - |
| (adjective) (used of color) having a relatively small amount of coloring agent | Synonyms: light-colored |
| (adjective) characterized by or emitting light | - |
| (adjective) (physics, chemistry) not having atomic weight greater than average | - |
| (adjective) of little intensity or power or force | - |
| (adjective) easily assimilated in the alimentary canal; not rich or heavily seasoned | - |
| (adjective) silly or trivial | Synonyms: idle |
| (adjective) weak and likely to lose consciousness | Synonyms: faint, light-headed, lightheaded, swooning |
| (adjective) having little importance | - |
| (adjective) less than the correct or legal or full amount often deliberately so | Synonyms: scant, short |
| (adjective) designed for ease of movement or to carry little weight | - |
| (adjective) moving easily and quickly; nimble | Synonyms: lightsome, tripping |
| (adjective) (used of soil) loose and large-grained in consistency | - |
| (adjective) having relatively few calories | Synonyms: calorie-free, lite, low-cal |
| (adjective) (of sound or color) free from anything that dulls or dims | Synonyms: clean, clear, unclouded |
| (adjective) (of sleep) easily disturbed | Synonyms: wakeful |
| (adjective) marked by temperance in indulgence | Synonyms: abstemious |
| (adjective) very thin and insubstantial | - |
| (adjective) casual and unrestrained in sexual behavior | Synonyms: easy, loose, promiscuous, sluttish, wanton |
| (adjective) demanding little effort; not burdensome | - |
| (adjective) (used of vowels or syllables) pronounced with little or no stress | Synonyms: unaccented, weak |
| (adjective) intended primarily as entertainment; not serious or profound | - |
| lighted | (adjective) set afire or burning | Synonyms: lit |
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| (adjective) provided with artificial light | Synonyms: illuminated, lit, well-lighted |
| lightheaded | (adjective) lacking seriousness; given to frivolity | Synonyms: airheaded, dizzy, empty-headed, featherbrained, giddy, light-headed, silly |
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| (adjective) weak and likely to lose consciousness | Synonyms: faint, light-headed, light, swooning |
| lighthearted | (adjective) carefree and happy and lighthearted | Synonyms: blithe, blithesome, light-hearted, lightsome |
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| lightless | (adjective) without illumination | Synonyms: unilluminated, unlighted, unlit |
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| (adjective) giving no light | - |
| lightproof | (adjective) not penetrable by light | Synonyms: light-tight |
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| lightsome | (adjective) carefree and happy and lighthearted | Synonyms: blithe, blithesome, light-hearted, lighthearted |
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| (adjective) moving easily and quickly; nimble | Synonyms: light, tripping |
| lightweight | (adjective) weighing relatively little compared with another item or object of similar use | - |
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| (adjective) having no importance or influence | - |