adj. Smooth, glossy, and slippery: sidewalks slick with ice. See Synonyms at sleek.adj. Deftly executed; adroit: "as slick as a sonnet, but as dull as ditch water” ( Tallulah Bankhead). adj. Shrewd; wily.adj. Superficially attractive or plausible but lacking depth or soundness: a slick writing style. See Synonyms at glib.n. A smooth or slippery surface or area.n. A floating film of oil.n. A trail of floating material: a garbage slick. n. An implement used to make a surface slick, especially a chisel used for smoothing and polishing.n. Informal A magazine, usually of large popular readership, printed on high-quality glossy paper.n. A racing automobile tire with a smooth tread.n. Slang An unarmed military aircraft, especially a helicopter.v. To make smooth, glossy, or oily.v. Informal To make neat, trim, or tidy: slicked themselves up for the camera.