Smooth; glossy; soft: as, sleek hair; a sleek skin.Oily; plausible; insinuating; flattering: as, a sleek rogue; a sleek tongue.Dexterous; skilful; neat in execution or action: as, a sleek or slick bowler.n. A smooth, shining place or spot.To make smooth and glossy on the surface: as, to sleek or slick the hair.Technically— In currying and leather-dressing, to smooth the surface of (leather) by rubbing with an implement called a slicker.In hat-making, to attach (fur) to felt by hand-work.To smooth; remove roughness from.Figuratively, to calm; soothe.To move in a smooth manner; glide; sweep. Compare slike.In a sleek or slick manner; with ease and dexterity; neatly; skilfully.