smooth1 W3 comparative smoother, superlative smoothest
a smooth surface has no rough parts, lumps, or holes, especially in a way that is pleasant and attractive to touch [≠ rough]:
Her skin felt smooth and cool.
a smooth pebble
The stone steps had been worn smooth.
happening or operating successfully, without any problems
happening without problems
Sarah is responsible for the smooth running of the sales department.
The new government has promised a smooth transition of power.
➔ go smoothlyat smoothly (2)
with no sudden movements or changes of direction, especially in a way that is graceful or comfortable:
movement[only before noun]
Swing the tennis racquet in one smooth motion.
The jet made a smooth landing.
smooth flight/ride (=a comfortable trip in an airplane or car)
It wasn't a very smooth ride.
someone who is smooth is polite, confident, and relaxed, but is often not sincere:
a smooth salesmen
He was a smooth talker.
George is a smooth operator (=someone who does things in a smooth way).
a liquid mixture that is smooth has no big pieces in it [≠ lumpy]:
Beat the eggs and flour until they are smooth.
a voice or music that is smooth is soft and pleasant to listen to:
He has one of those silky smooth (=very smooth) voices.
a drink such as wine, coffee, whisky, or beer that is smooth is not bitter but tastes pleasant:
a smooth full-bodied wine
—smoothness noun [uncountable]➔ smooth-talking
the smoothness of his skin