momentane adjective 1noun 1forms 2 adjective1 •(no longer used) Momentary.The momentane afflictions of this lyfe are not woꝛthy of the gloꝛy that shall be shewed vpon vs. — 1570 noun1 •In Finnish and Navajo, a verb aspect indicating that an occurrence is sudden and short-lived. formsmore momentane · most momentane