Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “foam”

foam

noun [U] uk   /fəʊm/ us    /foʊm/

foam noun [U] (BUBBLES)

a mass of very small bubbles formed on the surface of a liquid a substance like cream that is filled with bubbles of air: shaving foam

foam noun [U] (SOFT MATERIAL)

a soft material used to fill furniture and other objects

foam

verb [I] uk   /fəʊm/ us    /foʊm/
to produce small bubbles foam at the mouth If a person or an animal foams at the mouth, they have bubbles coming out of their mouth as a result of a disease.
(Definition of foam from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of foam?
Add Cambridge dictionaries to your browser to your website

Definitions of “foam” in other dictionaries

Word of the Day

mutant

an organism that is different from others of its type because of a permanent change in its genes

Word of the Day

What’s that lovely smell?

by Kate Woodford​,
October 29, 2014
As adult humans, we can distinguish about 10,000 different smells. It’s no wonder, then, that we have so many words and expressions to describe them. This week we’re taking a look at those smell words – words that describe good smells and words that describe bad smells. Most smell words are either

Read More 

high-frequency trading noun

October 27, 2014
a type of stock market trading that uses very complex technology to trade extremely quickly, often making tiny profits which nevertheless add up to substantial sums Lewis’s book, Flash Boys, is driving a huge amount of attention toward the topic of high frequency trading, and it has rekindled some of

Read More