B1having a surface or consisting of a substance that is perfectly regular and has no holes, lumps, or areas that rise or fall suddenly: a smooth surface/texture/consistencyThis custard is deliciously smooth and creamy.Mix together the butter and sugar until smooth.The road ahead was flat and smooth.This cream will help to keep your skin smooth.Straight, even and levelsmoothness
/ˈsmuːð.nəs/noun[U]›The wine possesses a smoothness and balanced depth that is rare.I just love the smoothness of silk.Straight, even and levelPleasant to eat or drinkWines and winemakingContinuous and permanent