What is the meaning of Swap?

To exchange or give (something) in an exchange (for something else).

To hit, to strike.

To beat the air, or ply the wings, with a sweeping motion or noise; to flap.

To descend or fall; to rush hastily or violently.

An exchange of two comparable things.

A financial derivative in which two parties agree to exchange one stream of cashflow against another stream.

Space available in a swap file for use as auxiliary memory.

A social meal at a restaurant between two university societies, usually involving drinking and banter; commonly associated with fining and pennying; equivalent to a crewdate at Oxford University.

A blow; a stroke.

swap (financial derivative)

swap (auxiliary memory)

Source: wiktionary.org