One who, or that which, smooths. / In glass-cutting, an abrading-wheel for polishing the aces of the grooves cut by another wheel.

plural of smoothie

present participle of smoothen

Third-person singular simple present indicative form of smoothen

(transitive) To make smooth. / (intransitive) To become smooth.

simple past tense and past participle of smoothen

(firearms) having a bore with a smooth interior, ie. one that has not been rifled

(firearms) a cannon, gun or other firearm that has an unrifled barrel.

plural of smoothbore

Somewhat smooth.