Source : Webster's Revised Unabridged Dictionary (1913)

Thin \Thin\, v. t. [imp. & p. p. {Thinned}; p. pr. & vb. n.
   {Thinning}.] [Cf. AS. ge[thorn]ynnian.]
   To make thin (in any of the senses of the adjective).

Source : WordNet®

thin
     adj 1: of relatively small extent from one surface to the opposite
            or in cross section; "thin wire"; "a thin chiffon
            blouse"; "a thin book"; "a thin layer of paint" [ant:
            {thick}]
     2: lacking excess flesh; "you can't be too rich or too thin";
        "Yon Cassius has a lean and hungry look"-Shakespeare [syn:
         {lean}] [ant: {fat}]
     3: very narrow; "a thin line across the page" [syn: {slender}]
     4: having little substance or significance; "a flimsy excuse";
        "slight evidence"; "a tenuous argument"; "a thin plot"
        [syn: {flimsy}, {slight}, {tenuous}]
     5: not dense; "a thin beard"; "trees were sparse" [syn: {sparse}]
     6: relatively thin in consistency or low in density; not
        viscous; "air is thin at high altitudes"; "a thin soup";
        "skimmed milk is much thinner than whole milk"; "thin oil"
        [ant: {thick}]
     7: (of sound) lacking resonance or volume; "a thin feeble cry"
        [ant: {full}]
     8: lacking spirit or sincere effort; "a thin smile"
     [also: {thinning}, {thinned}, {thinnest}, {thinner}]

thin
     adv : without viscosity; "the blood was flowing thin" [syn: {thinly}]
           [ant: {thickly}]
     [also: {thinning}, {thinned}, {thinnest}, {thinner}]

thin
     v 1: lose thickness; become thin or thinner [ant: {thicken}]
     2: make thin or thinner; "Thin the solution" [ant: {thicken}]
     3: lessen the strength or flavor of a solution or mixture; "cut
        bourbon" [syn: {dilute}, {thin out}, {reduce}, {cut}]
     4: take off weight [syn: {reduce}, {melt off}, {lose weight}, {slim},
         {slenderize}, {slim down}] [ant: {gain}]
     [also: {thinning}, {thinned}, {thinnest}, {thinner}]

thinning
     n : the act of diluting something; "the cutting of whiskey with
         water"; "the thinning of paint with turpentine" [syn: {cutting}]

thinning
     See {thin}