Foam \Foam\, v.i. [imp. & p. p. Foamed; p. pr. & vb. n. Foaming.]

[AS. f?man. See Foam, n.]

1. To gather foam; to froth; as, the billows foam.

He foameth, and gnasheth with his teeth. --Mark ix. 18.

2. To form foam, or become filled with foam; -- said of a steam boiler when the water is unduly agitated and frothy, as because of chemical action.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Foam \Foam\, v.t. To cause to foam; as,to foam the goblet; also (with out), to throw out with rage or violence, as foam. ``Foaming out their own shame.'' --Jude 13.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Foam \Foam\, n. [OE. fam, fom, AS. f?m; akin to OHG. & G. feim.]

The white substance, consisting of an aggregation of bubbles, which is formed on the surface of liquids, or in the mouth of an animal, by violent agitation or fermentation; froth; spume; scum; as, the foam of the sea.

Foam cock, in steam boilers, a cock at the water level, to blow off impurities.

Source: Webster's Revised Unabridged Dictionary (1913)