A spherical or almost spherical body: a ball of flame.
Sports Any of various rounded, movable objects used in various athletic activities and games.
Sports Such an object moving, thrown, hit, or kicked in a particular manner: a low ball; a fair ball.
Sports A game, especially baseball or basketball, played with such an object.
Sports A pitched baseball that does not pass through the strike zone and is not swung at by the batter.
A solid spherical or pointed projectile, such as one shot from a cannon.
Projectiles of this kind considered as a group.
A rounded part or protuberance, especially of the body: the ball of the foot.
Vulgar Slang The testicles.
Vulgar Slang Courage, especially when reckless.
Vulgar Slang Great presumptuousness.
To form into a ball.
Vulgar Slang To have sexual intercourse with.
To become formed into a ball.
Vulgar Slang To have sexual intercourse.
ball up To confuse; bungle.
on the ball Informal Alert, competent, or efficient: a teacher who is really on the ball.
on the ball Informal Relating to qualities, such as competence, skill, or knowledge, that are necessary for success: a manager who has a lot on the ball; a student who has nothing on the ball.
A formal gathering for social dancing.
Informal An extremely enjoyable time or experience: We had a ball during our vacation.