<p><strong>Adjective</strong></p><ul><li>smooth or glossy, as hair, an animal, etc.</li><li>well-fed or well-groomed.</li><li>trim and graceful; finely contoured; streamlined: a sleek sports car.</li><li>smooth in manners, speech, etc.; suave.</li><li>cleverly or deceitfully skillful; slick: a sleek confidence man.</li></ul><p><strong>Synonyms</strong></p><ul><li>slippery, shady, glib, shrewd, artful, smooth, refined, polished</li></ul>