Webster's English Dictionary

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thin

1. thin \'thin\ \'thin-n*s\ \'thin-ish\ aj or thin.ner;  or thin.nest [ME 
   thinne, fr. OE thynne; akin to OHG dunni thin, L tenui]s thin, tene-re to 
   hold, tendere to stretch, Gk teinein 1a: having little extent from one 
   surface to its opposite {~ paper } 1b: measuring little in cross section or 
   diameter {~ rope}  2: not dense in arrangement or distribution {~ hair}  3: 
   not well fleshed : LEAN  4a: more fluid or rarefied than normal {~ air}  
   4b: having less than the usual number : SCANTY {~ attendan ce} 4c: few in 
   number : SCARCE  4d: scantily supplied  4e: characterized by a paucity of 
   bids or offerings {~ market}  5: lacking substance or strength {~ broth}  
   6a: FLIMSY, UNCONVINCING {~ excuse}  6b: not up to expectations  7: 
   somewhat feeble, shrill, and lacking in resonance {~ voice}  8: lacking in 
   intensity or brilliance {~ light}  9: ready to give way  10: lacking 
   sufficient photographic density or contrast ean not thick, broad, abundant, 
   or dense. THIN implies comparatively little extension between surfaces or 
   in diameter, or it may imply lack of substance, richness, or abundance; 
   SLENDER implies leanness or spareness often with grace and good proportion; 
   SLIM applies to slenderness that suggests fragility or scantiness; SLIGHT 
   implies smallness as well as thinness; TENUOUS implies extreme thinness, 
   sheerness, or lack of substance and firmness - thin.ly av SYN syn THIN, 
   SLENDER, SLIM, SLIGHT, TENUOUS m 
2. thin av or thin.ner;  or thin.nest : THINLY - used esp. in combinations 
   {thin-clad} 
3. thin vb or thinned;  or thin.ning : to make thin or thinner  : to reduce 
   in thickness or depth : ATTENUATE  : to make less dense or viscous  : 
   DILUTE, WEAKEN  : to cause to lose flesh  : to reduce in number or bulk  1: 
   to become thin or thinner  2: to become weak