free from projections or unevenness of surface; not rough:
smooth wood; a smooth road.
2.
generally flat or unruffled, as a calm sea.
3.
free from hairs or a hairy growth:
a smooth cheek.
4.
of uniform consistency; free from lumps, as a batter, sauce, etc.
5.
free from or proceeding without abrupt curves, bends, etc.:
a smooth ride.
6.
allowing or having an even, uninterrupted movement or flow:
smooth driving.
7.
easy and uniform, as motion or the working of a machine.