#1 thin a. 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". wn
#2 thin a. [lean] lacking excess flesh; "you can't be too rich or too thin"; "Yon Cassius has a lean and hungry look"-Shakespeare. wn
#3 thin s. [slender] very narrow; "a thin line across the page". wn
#4 thin v. lose thickness; become thin or thinner. wn
#5 thin s. [sparse] not dense; "a thin beard"; "trees were sparse". wn
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