Foam
WordNet
noun
(1) A mass of small bubbles formed in or on a liquid
"The beer had a thick head of foam"
(2) A lightweight material in cellular form; made by introducing gas bubbles during manufacture
verb
(3) Form bubbles
"The boiling soup was frothing"
"The river was foaming"
"Sparkling water"
WiktionaryText
Noun
- A substance composed of a large collection of bubbles or their solidified remains.
- He doesn't like so much foam in his beer.
- A foam mat can soften a hard seat.