Definition of foam in English:

foam

Syllabification: foam
Pronunciation: /fōm
 
/

noun

1A mass of small bubbles formed on or in liquid, typically by agitation or fermentation: a beer with a thick head of foam
More example sentences
  • She poured a dollop into her hands and raked her fingers through her hair, lathering the shampoo into a thick white foam.
  • The molinillo was placed in the chocolate pot and agitated to form foam.
  • As a coffee shop, they offer all the extras you hope for, including lattes served in pre-warmed mugs decorated with thick drifts of creamy foam.
Synonyms
froth, spume, surf; fizz, effervescence, bubbles, head; lather, suds
1.1A mass of small bubbles formed from saliva or sweat.
More example sentences
  • A small opening in the corner of his lips let some saliva foam through.
  • The gauchos of Argentina wore chaps that hardened from the foam and sweat of the horse's body, causing them to walk with flexed knees.
  • Their coats were dark with sweat, and streaked with white foam.
1.2A thick preparation containing many small bubbles: shaving cream (foam type) does a fine job on my beard
More example sentences
  • He said the foam had the consistency of shaving foam, but much smaller, and is entirely harmless.
  • But the cake, shaped like a Reese's cup with a liquid center and curry-touched foam, is pure yum.
  • They make a decent café au lait that's served in a glass and topped with a thick, lip-sticking foam.
1.3A lightweight form of rubber or plastic made by solidifying liquid foam.
More example sentences
  • A piece of dry foam rubber or foam plastic, rubbed over the garment, will usually take them off.
  • Plastic, foam or rubber thongs are completely casual, but can be worn off the beach nonetheless.
  • Once the rubber and mounting foam have been cut, the stamps are glued to a wooden mound and are ready to impress!
1.4 (the foam) literary The sea: Venus rising from the foam

verb

[no object] Back to top  
Form or produce a mass of small bubbles; froth: the sea foamed beneath them
More example sentences
  • She saw the boats pulling away from the docks and the water foamed and bubbled beneath them.
  • The tub is slick, and with lots of slippery bubbles foaming up from the jets, you'd best watch your step.
  • Stir and set aside for 5 or 6 minutes, until mixture bubbles and foams.
Synonyms
froth, spume; fizz, effervesce, bubble; lather; ferment, rise; boil, seethe, simmer

Origin

Old English fām (noun), fǣman (verb); related to Old High German feim (noun), feimen (verb).

Phrases

foam at the mouth

informal Be very angry.
More example sentences
  • Ed Harris is angry and foaming at the mouth as Moss, a man who seems to be traveling down the same road as Shelley.
  • Anyway, this is supposed to get us all foaming at the mouth with indignation but quite frankly this law doesn't make any sense.
  • Bianca was beside herself, still cuffed, doing everything but foaming at the mouth.

Derivatives

foamless

adjective
More example sentences
  • Still, most brewers feel that with foamless yeasts they get the same quality of sake, with less mess.
  • The invention relates to a substantially foamless sintered glass body with a decorative pattern.
  • However, some experts say that the these foamless versions are not quite what their bubbling cousins are, in terms of the final product.

Definition of foam in:

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