Noah Webster's Dictionary 1. (p. pr. & vb. n.) of Leaven. 2. (n.) The act of making light, or causing to ferment, by means of leaven. 3. (n.) That which leavens or makes light.

Multi-Version Concordance Leavening (1 Occurrence) Hosea 7:4 All of them 'are' adulterers, Like a burning oven of a baker, He ceaseth from stirring up after kneading the dough, till its leavening. (YLT)