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WordReference Random House Learner's Dictionary of American English © 2024foam /foʊm/USA pronunciation n. [uncountable]- a collection of tiny bubbles on the surface of a liquid:beer with a head of foam.
- a thick, frothy substance:A special foam kept the wreckage from catching on fire.
- Chemistrya lightweight material in which gas bubbles are dispersed in a solid, used as insulation.
v. [no object] - to form foam;
froth:The boiling milk foamed.
Idioms- Idioms foam at the mouth, [no obj] to be extremely angry:almost foaming at the mouth at the insult.
foam•y, adj., -i•er, -i•est. WordReference Random House Unabridged Dictionary of American English © 2024foam (fōm),USA pronunciation n. - a collection of minute bubbles formed on the surface of a liquid by agitation, fermentation, etc.:foam on a glass of beer.
- the froth of perspiration, caused by great exertion, formed on the skin of a horse or other animal.
- froth formed from saliva in the mouth, as in epilepsy and rabies.
- a thick frothy substance, as shaving cream.
- (in firefighting)
- a chemically produced substance that smothers the flames on a burning liquid by forming a layer of minute, stable, heat-resistant bubbles on the liquid's surface.
- the layer of bubbles so formed.
- Chemistrya dispersion of gas bubbles in a solid, as foam glass, foam rubber, polyfoam, or foamed metal.
- [Literary.]the sea.
v.i. - to form or gather foam;
emit foam;
froth.
v.t. - to cause to foam.
- to cover with foam;
apply foam to:to foam a runway before an emergency landing. - to insulate with foam.
- to make (plastic, metal, etc.) into a foam.
- Idioms foam at the mouth, to be extremely or uncontrollably angry.
- bef. 900; Middle English fom, Old English fām; cognate with German Feim
- 1.See corresponding entry in Unabridged froth, spume, head, fizz; scum.
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