† diˈventilate,v.Obs.rare—0. [F. L. dīventilāre, f.ventilāre to fan, winnow, toss in the air.] (See quot.) Hence † diventiˈlation. 1656Blount Glossogr., Diventilate, to fan or winnow,..also to turn out of one hand into another.1658Phillips, Diventilation, a winnowing, or tossing to and fro.