- 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.
- a dispersion of gas bubbles in a solid, as foam glass, foam rubber, polyfoam, or foamed metal.
- Literary. the sea.
- to form or gather foam; emit foam; froth.
- 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.
- foam at the mouth, to be extremely or uncontrollably angry.
Origin of foam
SynonymsSee more synonyms for foam on Thesaurus.com
Examples from the Web for foaming
Thrown into a foaming red rage by the ending of The Sopranos or Lost or BSG or Mass Effect?How ‘Battlestar Galactica,’ ‘Game of Thrones,’ and FanFiction Conquered Pop Culture
May 6, 2014
The haunting video shows apparent victims, including children, convulsing and foaming at the mouth.Six Chilling Moments from Charlie Rose’s Assad Interview (VIDEO)
September 9, 2013
What if Rush Limbaugh and the rest of the foaming right-wing pundit crowd aren't the face of modern conservatism?Patriot Games
October 16, 2009
When the butter is foaming, lay in a batch of floured codfish chunks in one layer, not crowded.Salt Cod, Scampi, Filet of Grouper
The Daily Beast
December 23, 2008
A moment more and we are in the midst of the eddying, rushing, foaming rapids.The Roof of France
Nothing was before him, save the foaming, dashing, measureless ocean.The Three Golden Apples
There dashes a horseman with foaming steed and tightly-gathered rein!Farm Ballads
His father, foaming with rage, ordered his servants to seize him.Wilfrid Cumbermede
He did not dare to show anger in his replies, yet he was foaming.The Memoirs of Louis XIV., His Court and The Regency, Complete
Duc de Saint-Simon
- a mass of small bubbles of gas formed on the surface of a liquid, such as the froth produced by agitating a solution of soap or detergent in water
- frothy saliva sometimes formed in and expelled from the mouth, as in rabies
- the frothy sweat of a horse or similar animal
- any of a number of light cellular solids made by creating bubbles of gas in the liquid material and solidifying it: used as insulators and in packaging
- (as modifier)foam rubber; foam plastic
- a colloid consisting of a gas suspended in a liquid
- a mixture of chemicals sprayed from a fire extinguisher onto a burning substance to create a stable layer of bubbles which smothers the flames
- a poetic word for the sea
- to produce or cause to produce foam; froth
- (intr) to be very angry (esp in the phrase foam at the mouth)
Word Origin and History for foaming
Old English fam "foam, saliva froth," from West Germanic *faimo- (cf. Old High German veim, German Feim), from PIE *(s)poi-mo-, a root with connotations of "foam, froth" (cf. Sanskrit phenah; Latin pumex "pumice," spuma "foam;" Old Church Slavonic pena "foam;" Lithuanian spaine "a streak of foam"). The rubber or plastic variety so called from 1937.
Old English famgian "to foam," from the source of foam (n.). Related: Foamed; foaming.