(noun, verb)


1. a mass of small bubbles formed in or on a liquid

- the beer had a thick head of foam

Similar word(s): froth

Definition categories: object, bubble

2. a lightweight material in cellular form; made by introducing gas bubbles during manufacture

Definition categories: substance, material, stuff

Sentences with foam as a noun:

- He doesn't like so much foam in his beer.

- A foam mat can soften a hard seat.

- He is in Europe, across the foam.


1. become bubbly or frothy or foaming

- The river was foaming

Similar word(s): effervesce, fizz, froth, sparkle

Definition categories: change, bubble