Middle English, smooth, slight, probably from Old English sliht- (in eorth-slihtes level with the ground); akin to Old High German sleht smooth, slīhhan to glide
adjective
having a slim or delicate build : not stout or massive in body
deficient in weight, solidity, or importance : trivial
thinslenderslimslighttenuous mean 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.