A substance composed of a large collection of bubbles or their solidified remains, including small bubbles created on the surface of water, formed from bodily fluids, on the surface of a heated, fermented or carbonated liquid, created by mixing soap with water, and formed by mixing an extinguishing agent with water for firefighting purposes.

A material formed by trapping pockets of gas in a liquid or solid.

(figurative, poetic) The sea.

Fury.

(intransitive) To form or emit foam.

(intransitive) To spew saliva as foam; to foam at the mouth.

(firefighting) To coat or cover with foam.