1 smooth /ˈsmuːð/ adjective
smoother; smoothest
1 smooth
smoother; smoothest
Learner's definition of SMOOTH
: having a flat, even surface : not rough : not having any bumps, ridges, or uneven parts
of a liquid mixture : not having any lumps : mixed together so there are no lumps
: happening or done without any problems
: even and regular without sudden movements
: not having or causing sudden, violent movements
opposite rough
informal : relaxed, confident, and pleasant in a way that may be intended to deceive people
see also smoothie
: not sharp, bitter, or unpleasant in taste or smell
: pleasant to hear or listen to

smooth sailing

see sailing

take the rough with the smooth

see 3rough

— smoothness

noun [noncount]
2 smooth /ˈsmuːð/ verb
smoothes; smoothed; smoothing
2 smooth
smoothes; smoothed; smoothing
Learner's definition of SMOOTH
[+ object]
: to make (something) smooth
often + back or down
see also smooth out (below)
: to remove problems or difficulties from a situation
always followed by an adverb or preposition : to spread (something) over a surface (such as your skin) : to apply (something) by rubbing it on a surface

smooth away

[phrasal verb]
smooth (something) away or smooth away (something)
: to make (problems, difficulties, etc.) less serious : to remove (problems, difficulties, etc.)

smooth out

[phrasal verb]
smooth (something) out or smooth out (something)
: to make (something) smooth or flat
: to make (something) easier by removing or dealing with problems

smooth over

[phrasal verb]
smooth (something) over or smooth over (something)
: to make (a disagreement, problem, difficulty, etc.) seem less serious than it really is