swap
To exchange or give (something) in an exchange (for something else).
(obsolete) To hit, to strike.
(obsolete) To beat the air, or ply the wings, with a sweeping motion or noise; to flap.
(obsolete) To descend or fall; to rush hastily or violently.
An exchange of two comparable things.
(finance) 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.
(Cantab slang) 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).
(dialect) A blow; a stroke.