Definition of foam in English:

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Pronunciation: /fəʊm/


[mass 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.
1.1A mass of small bubbles formed from saliva or sweat.
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 liquid preparation containing many small bubbles: shaving foam
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: [as modifier]: foam rubber
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


[no object]
Form or produce a mass of small bubbles; froth: the sea foamed beneath them (as adjective foaming) pints of foaming bitter
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.
froth, froth up, cream, bubble, fizz, effervesce, spume, lather, ferment, rise, boil, seethe, simmer


foam at the mouth

informal Be very angry.
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.



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.


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

Words that rhyme with foam

brome, chrome, comb, Crome, dome, gnome, holm, Holme, hom, home, Jerome, loam, Nome, ohm, om, roam, Rome, tome

For editors and proofreaders

Line breaks: foam

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