(noun, verb)


1. a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey

Similar word(s): barm

Definition categories: substance, leaven, leavening

2. any of various single-celled fungi that reproduce asexually by budding or division

Definition categories: plant, fungus


1. To ferment.

2. (of something prepared with a yeasted dough) To rise.