Definitions

1. noun

A microorganism of the fungus kingdom, typically a single cell, that is used in baking and brewing to cause fermentation.

“The baker added yeast to the dough to make the bread rise.”

2. verb

To cause (a mixture) to undergo fermentation, typically by adding yeast.

“The mixture was yeasted overnight before being baked.”

3. verb

To become or make something more lively or active.

“The new policy yeasted the stagnant company.”