Smooth a. [Compar. Smoother superl. Smoothest.]
 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. Mech. & Physics Causing no resistance to a body sliding along its surface; frictionless.
 Note: ☞ Smooth is often used in the formation of self-explaining 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.
 Syn: -- Even; plain; level; flat; polished; glossy; sleek; soft; bland; mild; soothing; voluble; flattering; adulatory; deceptive.