foam

(fōm)

1. a. A mass of bubbles of air or gas in a matrix of liquid film, especially an accumulation of fine, frothy bubbles formed in or on the surface of a liquid, as from agitation or fermentation.
   b. A thick chemical froth, such as shaving cream or a substance used to fight fires.
2. a. Frothy saliva produced especially as a result of physical exertion or a pathological condition.
   b. The frothy sweat of a horse or other equine animal.
3. The sea.
4. Any of various light, porous, semirigid or spongy materials used for thermal insulation or shock absorption, as in packaging.

1. To produce or issue as foam; froth.
2. a. To produce foam from the mouth, as from exertion or a pathological condition.
   b. To be extremely angry; rage: was foaming over the disastrous budget cuts.
3. To teem; seethe: a playground foaming with third graders.

1. To cause to produce foam.
2. To cause to become foam.