† inˈcentionObs.rare—0. In 7 -sion. [ad. L. incentiōn-em, n. of action f.incinĕre to sing to, blow on an instrument, f.in- (in-2) + canĕre to sing.] (See quot.) 1656Blount Glossogr., Incension (ab incino), melody of Instruments, or of men singing together.