A substance composed of a large collection of bubbles or their solidified remains.
He doesn't like so much foam in his beer.
A substance formed by trapping pockets of gas in a liquid or solid.
A foam mat can soften a hard seat.
(by extension) Sea foam; the sea.
He is in Europe, across the foam.
Fury.
To form or emit foam.
To spew saliva as foam, to foam at the mouth.