noun \ˈfōm\

: a mass of small bubbles that are formed in or on a liquid

: a substance that is like a thick liquid made of many small bubbles

: a soft material that is used to make many products

Full Definition of FOAM

:  a light frothy mass of fine bubbles formed in or on the surface of a liquid or from a liquid: as
a :  a frothy mass formed in salivating or sweating
b :  a stabilized froth produced chemically or mechanically and used especially in fighting oil fires
c :  a material in a lightweight cellular form resulting from introduction of gas bubbles during manufacture
:  sea
:  something resembling foam
foam·less \-ləs\ adjective

Examples of FOAM

  1. As I poured the beer, foam bubbled up in the glass.
  2. The fire extinguisher is filled with foam.
  3. a can of shaving foam

Origin of FOAM

Middle English fome, from Old English fām; akin to Old High German feim foam, Latin spuma foam, pumex pumice
First Known Use: before 12th century

Related to FOAM

Rhymes with FOAM



: to produce foam

Full Definition of FOAM

intransitive verb
a :  to produce or form foam
b :  to froth at the mouth especially in anger; broadly :  to be angry
:  to gush out in foam
:  to become covered with or as if with foam <streets…foaming with life — Thomas Wolfe>
transitive verb
:  to cause to foam; specifically :  to cause air bubbles to form in
:  to convert (as a plastic) into a foam
foam·able \ˈfō-mə-bəl\ adjective
foam·er \fō-mər\ noun

Examples of FOAM

  1. The soda foamed in the glass.
  2. The mixture will bubble and foam when you add the yeast.

First Known Use of FOAM

before 12th century


noun \ˈfōm\   (Medical Dictionary)

Medical Definition of FOAM

: a light frothy mass of fine bubbles formed in or on the surface of a liquid <spermicidal foam>
foam verb


Next Word in the Dictionary: foam cell
Previous Word in the Dictionary: foalhood
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