leaven
1leav·en
noun \ˈle-vən\Definition of LEAVEN
1
a : a substance (as yeast) used to produce fermentation in dough or a liquid; especially : sourdough b : a material (as baking powder) used to produce a gas that lightens dough or batter
2
: something that modifies or lightens
Examples of LEAVEN
- a serious book that includes a few humorous stories as leaven
Origin of LEAVEN
Middle English levain, from Anglo-French levein, from Vulgar Latin *levamen, from Latin levare to raise — more at lever
First Known Use: 14th century
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