What is the meaning of Foam?

A substance composed of a large collection of bubbles or their solidified remains, especially:

A collection of small bubbles created when the surface of a body of water is moved by tides, wind, etc.

A collection of small bubbles formed from bodily fluids such as saliva or sweat.

A collection of small bubbles on the surface of a liquid that is heated, fermented or carbonated.

A collection of small bubbles created by mixing soap with water.

A collection of small bubbles formed by mixing an extinguishing agent with water, used to cover and extinguish fires.

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

The sea.

Fury.

Sneakers.

To form or emit foam.

To spew saliva as foam; to foam at the mouth.

To coat or cover with foam.

Source: wiktionary.org