adjective

1. Having a texture that lacks friction. Not rough.

2. Without difficulty, problems, or unexpected consequences or incidents.

   “We hope for a smooth transition to the new system.”

3. Bland; glib.

Synonyms: even, fluid

noun

1. One who, or that which, smooths.

2. In glass-cutting, an abrading-wheel for polishing the aces of the grooves cut by another wheel.

3. A flatterer.