having an even and regular surface; free from perceptible projections, lumps, or indentations

smooth flat rocks

his face was curiously smooth and youthful

(of movement) without jerks

the trucks gave a smooth ride

graphics are excellent, with fast, smooth scrolling

(of an action, event, or process) without problems or difficulties

the group's expansion into the US market was not quite so smooth

(of a person or their manner) suavely charming in a way regarded as possibly insincere

his voice was infuriatingly smooth

(of food or drink) without harshness or bitterness

a lovely, smooth, very fruity wine

give (something) a flat, regular surface or appearance

she smoothed out the newspaper

you can use glasspaper to smooth the joint

deal successfully with (a problem or difficulty)

these doctrinal disputes were smoothed over

in a way that is without difficulties

the course of true love never did run smooth