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The Collaborative International Dictionary of English v.0.48 (gcide)

Foam \Foam\ (f[=o]m), 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.
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Foam \Foam\ (f[=o]m), n. [OE. fam, fom, AS. f[=a]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.
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{Foam cock}, in steam boilers, a cock at the water level, to
blow off impurities.
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Foam \Foam\ (f[=o]m), v. i. [imp. & p. p. {Foamed} (f[=o]md); p.
pr. & vb. n. {Foaming}.] [AS. f[=ae]man. See {Foam}, n.]
1. To gather foam; to froth; as, the billows foam.
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He foameth, and gnasheth with his teeth. --Mark ix.
18.
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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.
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