Language: Old English
Origin: fam


1 noun
foam1 [uncountable]
1D also foam rubber a type of soft rubber with a lot of air in it, used in furniture:
a foam mattress
2 a mass of very small bubbles on the surface of a liquid [= froth]:
She scraped the foam off her coffee.
3DCB a substance which is like a very thick soft liquid with a lot of bubbles in it:
Firefighters using water and foam are still tackling the blaze.
shaving foam
foamy adjective

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