Definition of smoothness

• a texture without roughness; smooth to the touch; "admiring the slim smoothness of her thighs"; "some artists prefer the smoothness of a board"
• powerful and effective language; "his eloquence attracted a large congregation"; "fluency in spoken and written English is essential"; "his oily smoothness concealed his guilt from the police"
• the quality of being bland and gracious or ingratiating in manner