What is Ball?

Ball definition and meaning on Dictionary terms:
a spherical or approximately spherical body or shape; sphere: He rolled the piece of paper into a ball.
a round or roundish body, of various sizes and materials, either hollow or solid, for use in games, as baseball, football, tennis, or golf.

a game played with a ball, especially baseball: The boys are out playing ball.
Baseball. a pitched ball, not swung at by the batter, that does not pass over home plate between the batter’s shoulders and knees.
Military. a solid, usually spherical projectile for a cannon, rifle, pistol, etc., as distinguished from a shell. projectiles, especially bullets, collectively.

any part of a thing, especially of the human body, that is rounded or protuberant: the ball of the thumb.
a round mass of food, as of chopped meat, dough, or candy.
Slang: Vulgar. a testis.
balls, Slang: Vulgar. boldness; courage; brashness. nonsense (often used as an interjection).

bolus(def 1).
Horticulture. a compact mass of soil covering the roots of an uprooted tree or other plant.
Literary. a planetary or celestial body, especially the earth.
Mathematics. (in a metric space) the set of points whose distance from the zero element is less than, or less than or equal to, a specified number.

verb (used with object)
to make into a ball (sometimes followed by up): The children were balling up snow to make a snowman.
to wind into balls: to ball cotton.

Slang: Vulgar. to have sexual intercourse with.

verb (used without object)
to form or gather into a ball: When the spun sugar balls, the candy has cooked sufficiently.
Slang: Vulgar. to have sexual intercourse.

Verb Phrases
ball up, Slang. to make or become utterly confused; muddle: The records had been all balled up by inefficient file clerks.