The condition of being smooth; the degree or measure of said condition. / (mathematical analysis, of a function) The highest order of derivative (the differentiability class) over a given domain.

plural of smoothness

Having a texture that lacks friction. Not rough. / Without difficulty, problems, or unexpected consequences or incidents. / Bland; glib.

Smoothly.

Something that is smooth, or that goes smoothly and easily. / A smoothing action. / A domestic animal having a smooth coat. / A member of an anti-hippie fashion movement in 1970s Britain.

(transitive) To make smooth or even. / (transitive) To reduce to a particular shape or form by pressure; to press, to flatten. / (transitive) To make straightforward or easy.

simple past tense and past participle of smooth

present participle of smooth

The act by which something is made smooth. / (phonetics, phonology) Monophthongization.

plural of smooth