(nautical) An alert aboard a warship, summoning the crew to man all weapons and all stations.

(idiomatic) A challenge with the odds of success stacked strongly against.

(India, dated) An exchange rate. / (India, dated) The discount on uncurrent coins. / (India, dated) Extra pay; especially an extra allowance to an English officer serving in India.

The region or line along which opposing armies engage in combat. / The area in which opponents or opposing ideas meet.

A game played with a shuttlecock and rackets (properly battledore and shuttlecock); a forerunner of badminton. / The racket used in this game. / (obsolete) A child's hornbook for learning the alphabet.

(physics) A form of electrochemical storage cell in which electrolyte flows between connected tanks; the direction of flow being opposite when the cell is charging and discharging; used to store electricity from intermittent suppliers such as wind farms.

(archaic) A battery; a voltaic cell.

(law, idiomatic) The combination of two violent crimes: assault (the threat of violence) and battery (physical violence). This legal distinction exists only in jurisdictions that distinguish assault as threatened violence rather than actual violence.

simple past tense and past participle of bat

(Britain, informal) A bus that is used as a mobile office and publicity centre by a politician or party during the run-up to an election