Definitions
1.nounSomething, such as a yeast or barm, that causes fermentation.
2.nounA state of agitation or of turbulent change.
3.nounA gentle internal motion of the constituent parts of a fluid; fermentation.
4.nounA catalyst.
5.verbTo react, using fermentation; especially to produce alcohol by aging or by allowing yeast to act on sugars; to brew.
6.verbTo stir up, agitate, cause unrest or excitement in.