Meaning of foam

foam

Pronunciation: (fōm), [key]
— n.
  1. a collection of minute bubbles formed on the surface of a liquid by agitation, fermentation, etc.: foam on a glass of beer.
  2. the froth of perspiration, caused by great exertion, formed on the skin of a horse or other animal.
  3. froth formed from saliva in the mouth, as in epilepsy and rabies.
  4. a thick frothy substance, as shaving cream.
  5. (in firefighting)
    1. 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.
    2. the layer of bubbles so formed.
  6. a dispersion of gas bubbles in a solid, as foam glass, foam rubber, polyfoam, or foamed metal.
  7. the sea.
—v.i.
  1. to form or gather foam; emit foam; froth.
—v.t.
  1. to cause to foam.
  2. to cover with foam; apply foam to: to foam a runway before an emergency landing.
  3. to insulate with foam.
  4. to make (plastic, metal, etc.) into a foam.
  5. to be extremely or uncontrollably angry.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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