SLEEK definition:smooth or glossy, as hair, an animal, etc. See examples of sleek used in a sentence.
Definition ofsleekadjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
1. smooth or glossy, as hair. 2. well-fed or well-groomed. 3. finely contoured; streamlined: asleeksports car. 4. smooth in manners, speech, etc.; suave.
sleek, adj. & adv. meanings, etymology, pronunciation and more in the Oxford English Dictionary

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smooth or glossy, such as hair:sleek, combed-back hair. well-fed or well-groomed: lookingsleekand healthy. finely shaped; streamlined: asleeksports car. smooth in manners, speech, etc.; suave.sleek•ly, adv.sleek•ness, n. [uncountable] WordReference Random House Unabridged Dictionary of American English © 2026 sleek1 (slēk), adj ...
sleek, slick, glossy mean having asmooth bright surface or appearance. sleek suggests a smoothness or brightness resulting from attentive grooming or physical conditioning.
If you describe someone as sleek, you mean that theylook rich and stylish. She works an array of different looks - from rock chick to sleek and sophisticated - in the stunning photo collection.

[also moresleek; mostsleek] 1 : straight and smooth in design or shape thesleeklines of a sports car asleek, modern building 2 : smooth and shiny
If your hair issleek, it is smooth and glossy. If your car issleek, it's shiny and looks like it goes fast.Sleekalways means smooth, glossy, and streamlined.