(mathematics) The set of points in a topological space lying within some open set containing a given point; the analogue of the disk in a Euclidean space.
An object, generally spherical, used for playing games.
(sports) The use of a round or ellipsoidal object.
(pinball) An opportunity to launch the pinball into play.
(cricket) A single delivery by the bowler, six of which make up an over.
(soccer) A pass; a kick of the football towards a teammate.
(printing, historical) A leather-covered cushion, fastened to a handle called a ballstock; formerly used by printers for inking the form, then superseded by the roller.
(farriery, historical) A large pill, a form in which medicine was given to horses; a bolus.
Verb
(transitive) To form or wind into a ball.
(metalworking) To heat in a furnace and form into balls for rolling.
(transitive) To gather balls which cling to the feet, as of damp snow or clay; to gather into balls.
(slang, usually in present participle) To be hip or cool.
(Australian rules football) An appeal by the crowd for holding the ball against a tackled player. This is heard almost any time an opposition player is tackled, without regard to whether the rules about "prior opportunity" to dispose of the ball are fulfilled.
