leaven meaning and definition

LEAVEN noun

Definition of leaven (noun)

1. a substance used to produce fermentation in dough or a liquid
   • synonyms: leavening
2. an influence that works subtly to lighten or modify something
   • "his sermons benefited from a leavening of humor"
   • synonyms: leavening

LEAVEN verb

Definition of leaven (verb)

1. cause to puff up with a leaven
   • "unleavened bread"
   • synonyms: prove, raise