thin (th?n)adj. thin·ner, thin·nest 1. a. Relatively small in extent from one surface to the opposite, usually in the smallest solid dimension: a thin book.b. Not great in diameter or cross section; fine: thin wire.2. Having little bodily flesh or fat; lean or slender.3. a. Not dense or concentrated; sparse: the thin vegetation of the plateau.b. More rarefied than normal: thin air.4. a. Flowing with relative ease; not viscous: a thin oil.b. Watery: thin soup.5. a. Sparsely supplied or provided; scanty: a thin menu.b. Having a low number of transactions: thin trading in the stock market.6. Lacking force or substance; flimsy: a thin attempt.7. Lacking resonance or fullness; tinny: The piano had a thin sound.8. Lacking radiance or intensity: thin light.9. Not having enough photographic density or contrast to make satisfactory prints. Used of a negative.adv.1. In a thin manner: Spread the varnish thin if you don’t want it to wrinkle.2. So as to be thin: Cut the cheese thin.tr. & intr.v. thinned, thin·ning, thins To make or become thin or thinner.[Middle English, from Old English thynne; see ten- in Indo-European roots.]thin?ly adv.thin?ness n.thin?nish adj.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.thin (??n) adj, thinner or thinnest1. of relatively small extent from one side or surface to the other; fine or narrow2. slim or lean3. sparsely placed; meagre: thin hair. 4. of relatively low density or viscosity: a thin liquid. 5. weak; poor; insufficient: a thin disguise. 6. (Photography) (of a photographic negative) having low density, usually insufficient to produce a satisfactory positive7. (Mountaineering) mountaineering a climb or pitch on which the holds are few and small8. thin on the ground few in number; scarceadvin order to produce something thin: to cut bread thin. vb, thins, thinning or thinnedto make or become thin or sparse[Old English thynne; related to Old Frisian thenne, Old Saxon, Old High German thunni, Old Norse thunnr, Latin tenuis thin, Greek teinein to stretch] ?thinly adv ?thinness nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014thin (??n) adj. thin?ner, thin?nest, adj. 1. having relatively little extent from one surface to the opposite: thin ice. 2. of small cross section in comparison with the length: a thin wire. 3. having little flesh; lean: a thin man. 4. composed of objects widely separated; sparse: thin vegetation. 5. scant. 6. of relatively slight consistency: thin soup. 7. rarefied, as air. 8. lacking solidity; flimsy: a thin excuse. 9. lacking volume; weak and shrill: a thin voice. 10. lacking force or a sincere effort: a thin smile. 11. lacking body or richness: a thin wine. 12. of light tint. 13. (of a photographic negative) lacking in contrast through underdevelopment or underexposure. adv. 14. in a thin manner. 15. sparsely; not densely. 16. so as to produce something thin: ham sliced thin. v.t. 17. to make thin or thinner (often fol. by down or out). v.i. 18. to become reduced or diminished (often fol. by down, out, or off): The crowd thinned out. [before 900; Middle English thyn(ne), Old English thynne, c. Old Frisian thenne] thin?ly, adv. thin?ness, n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.thinPast participle: thinnedGerund: thinningImperativePresentPreteritePresent ContinuousPresent PerfectPast ContinuousPast PerfectFutureFuture PerfectFuture ContinuousPresent Perfect ContinuousFuture Perfect ContinuousPast Perfect ContinuousConditionalPast ConditionalImperativethinthinPresentI thinyou thinhe/she/it thinswe thinyou thinthey thinPreteriteI thinnedyou thinnedhe/she/it thinnedwe thinnedyou thinnedthey thinnedPresent ContinuousI am thinningyou are thinninghe/she/it is thinningwe are thinningyou are thinningthey are thinningPresent PerfectI have thinnedyou have thinnedhe/she/it has thinnedwe have thinnedyou have thinnedthey have thinnedPast ContinuousI was thinningyou were thinninghe/she/it was thinningwe were thinningyou were thinningthey were thinningPast PerfectI had thinnedyou had thinnedhe/she/it had thinnedwe had thinnedyou had thinnedthey had thinnedFutureI will thinyou will thinhe/she/it will thinwe will thinyou will thinthey will thinFuture PerfectI will have thinnedyou will have thinnedhe/she/it will have thinnedwe will have thinnedyou will have thinnedthey will have thinnedFuture ContinuousI will be thinningyou will be thinninghe/she/it will be thinningwe will be thinningyou will be thinningthey will be thinningPresent Perfect ContinuousI have been thinningyou have been thinninghe/she/it has been thinningwe have been thinningyou have been thinningthey have been thinningFuture Perfect ContinuousI will have been thinningyou will have been thinninghe/she/it will have been thinningwe will have been thinningyou will have been thinningthey will have been thinningPast Perfect ContinuousI had been thinningyou had been thinninghe/she/it had been thinningwe had been thinningyou had been thinningthey had been thinningConditionalI would thinyou would thinhe/she/it would thinwe would thinyou would thinthey would thinPast ConditionalI would have thinnedyou would have thinnedhe/she/it would have thinnedwe would have thinnedyou would have thinnedthey would have thinnedCollins English Verb Tables © HarperCollins Publishers 2011