A gentle boiling; or the internal motion of the constituent parts of a fluid.

Intestine motion; heat; tumult; agitation; as, to put the passions in a ferment; the state of people are in a ferment. Subdue and cool the ferment of desire.

That which causes fermentation, as yeast, barm, or fermenting beer.

To set in motion; to excite internal motion; to heat; to raise by intestine motion. While youth ferments the blood.

To work; to effervesce; to be in motion, or to be excited into sensible internal motion, as the constituent particles of an animal or vegetable fluid. To the vinous fermentation we apply the termWe say that new cider, beer or wine ferments or works. But work is not applied to the other kinds of fermentation.