Webster
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Webster’s Revised Unabridged Dictionary · 1913

Foam

Foam (fōm), n. [OE. fam, fom, AS. fām; 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.

Foam, v. i. [imp. & p. p. Foamed (fōmd); 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.

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.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty. Of the others, 1,362 (a word or a single letter each) were inferred by AI from the context by the dictionary’s own rules and are marked with a wavy underline (tap or point at one to see the note); the rest, which could not be inferred with confidence, are left as “?”.