(nautical) The process of swinging and compensating a ship or aircraft compass by determining and reducing the deviation coefficients and recording the residual deviations; now done by computer.

(historical) Any of the agricultural riots in England in 1830, led by Captain Swing.

(psychology) A rapid and extreme changing in mood, from excessively happy to desperately miserable.

Proceeding fully, quickly, or completely; thoroughly begun and in progress.

(US politics) A state which may vote Democratic or Republican, in a given election or generally.

(cricket) Sideways movement of the old ball through the air in the opposite direction to normal swing.

(of a bowler) To make the ball so behave. / (of the ball) To swing in this manner.

(baseball) A ball that travels a short distance as if it were bunted, but was produced by a full or checked swing.

(baseball) A swing in which a batter starts to swing for a ball but stops the swing shortly before the ball reaches home plate.

A style of jazz, meshing string bands with other instrumentation - especially drums, saxophones, pianos and the steel guitar - that evolved into a subgenre of country music during the early 1940s.