(slang) A big setback or disappointment.

plural of Russian ball

A type of juggling ball with a hard, shiny outer shell, filled with sand or another filler material, and designed to be more visible than beanbags.

(juggling) A type of hollow juggling ball with a hard, shiny outer shell, designed to be more visible than beanbags.

plural of stage ball

A form of pool in which players must hit with the cue ball the object ball with the lowest numerical value, but may legally pot any ball apart from the white; whichever player pots the nine ball wins the game.

(topology, mathematical analysis, restricted to metric spaces) The set of all points in a metric space whose distance from a given point ("the open ball's center") is less than a given length ("the open ball's radius").

A form of handgun that fires projectiles of rubber of similar material, used mainly by law enforcement officers for riot control.

plural of flash-ball

(soccer) A forward pass played between opposition defenders.