Any substance that will produce a foam under specified conditions

Expanded latex. / (informal) Expanded polyurethane, the padding often used in cars and furniture.

plural of foam party

A social event in which participants dance to music on a dance floor covered in several feet of suds or bubbles dispensed from a foam machine.

(physics) A topological structure made out of two-dimensional faces that represents one of the configurations that must be summed to obtain a Feynman's path integral description of quantum gravity.

(physics) Spacetime viewed on a quantum level, i.e. as a "foam" of randomly appearing and disappearing Planck-scale wormholes (black holes and white holes).

Foam consisting of polyurethane and other chemicals used in the manufacturing of pillows, mattresses, laptop sleeves, etc, which reacts to body heat and molds to the shape of the body.

A mixture of highly tacky and/or tenacious materials, carried in compressed form with a propellant and used as an incapacitant.

plural of shaving foam

A manufactured product with a frothy consistency, supplied in an aerosol can and used for shaving.