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English definition of “sleek”

sleek

adjective     /sliːk/
(especially of hair, clothes, or shapes) smooth, shiny, and lying close to the body, and therefore looking well cared for; not untidy and with no parts sticking out: The cat had sleek fur. Who owns that sleek black car parked outside your house?disapproving He's one of those sleek (= seeming rich and dishonest) businessman types.Straight, even and level sleekly     /ˈsliː.kli/ adverb Straight, even and level sleekness     /ˈsliːk.nəs/ noun [U] Straight, even and level
(Definition of sleek adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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