intransitive. To emit foam; esp. to froth at the mouth; also with out. Often as a hyperbolical description of vehement rage or wrath. Also of a…

intransitive. To foam or froth. Also with out.

intransitive. Of other liquids: To form a scum or frothy layer on the surface; to mantle, foam, froth.

intransitive. To froth or foam; (of a vessel) to be full of a frothy liquid. Also with over: to overflow. Also in extended uses.

Of water: To be agitated, boil, seethe, foam. Obsolete.

intransitive. Of a liquid, esp. one forming an alcoholic drink: to be or become covered with a coating or scum; to form a head or froth; to cream. Of…

intransitive. To emit froth or foam; to foam at the mouth. Of liquids: To gather or throw up froth; to run foaming away, by, over.

intransitive. To foam. (See sudding, adj.)

intransitive. To froth or foam.

intransitive. To issue or rise in a spongy form; to foam; to drip as from a sponge.

intransitive (also reflexive). To ferment; to be covered with froth, as agitated water. Also figurative and with up.