1. Having an even surface, or a surface so even that no roughness or points can be perceived by the touch; not rough; as, smooth glass; smooth porcelain. The outlines must be smooth, imperceptible to the touch, and even, without eminence or cavities. (Dryden)
2. Evenly spread or arranged; sleek; as, smooth hair.
3. Gently flowing; moving equably; not ruffled or obstructed; as, a smooth stream.
4. Flowing or uttered without check, obstruction, or hesitation; not harsh; voluble; even; fluent. The only smooth poet of those times. (milton) Waller was smooth; but Dryden taught to join The varying verse, the full-resounding line. (pope) When sage minerva rose, From her sweet lips smooth elocution flows. (gay)
5. Bland; mild; smoothing; fattering. This smooth discourse and mild behavior oft Conceal a traitor. (Addison)
6. (Science: mechanics) Causing no resistance to a body sliding along its surface; frictionless.
Smooth is often used in the formation of selfexplaining compounds; as, smooth-bodied, smooth-browed, smooth-combed, smooth-faced, smooth-finished, smooth-gliding, smooth-grained, smooth-leaved, smooth-sliding, smooth-speaking, smooth-woven, and the like.
Synonym: even, plain, level, flat, polished, glossy, sleek, soft, bland, mild, soothing, voluble, flattering, adulatory, deceptive.
Origin: OE. Smothe, smethe, AS. Smethe, smoe<edt/e, where e, oe, come from an older o; cf. LG. Smode, smoe, smodig; of uncertain origin.