foam

Pronunciation

• (US) enPR: fōm, IPA ^(key): /foʊm/
• (UK) enPR: fōm, IPA ^(key): /fəʊm/

• Audio (US)

  (file)

Noun

Singular foam

Plural foams

1. Foam is a substance that is full of bubbles.

   A firm foam mattress can support your back just as well as other sleep surfaces.

   A line of white foam appeared between his lips.

• 
  Aluminium foam
• 
  A micrograph of memory foam
• 
  Polystyrene foam cushioning

Verb

Plain form foam

Third-person singular foams

Past tense foamed

Past participle foamed

Present participle foaming

1. (intransitive) If someone is foaming, he is spewing saliva from his mouth as foam.
2. (intransitive) If something foams, it form or gives off foam.

   Add the butter to a large sauce pan and swirl until it begins to foam.