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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.
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.
to form or gather into a ball:
When the spun sugar balls, the candy has cooked sufficiently.
Slang: Vulgar. to have sexual intercourse.
ball up, Slang. to make or become utterly confused; muddle:
The records had been all balled up by inefficient file clerks.
ball the jack, Slang.

to act with speed.
to stake everything on one attempt.

carry the ball, to assume the responsibility; bear the burden:
You can always count on him to carry the ball in an emergency.
drop the ball, to make a mistake or miss an opportunity at a critical moment.
keep the ball rolling, to continue or give renewed vigor to an activity already under way:
When their interest lagged, he tried to keep the ball rolling.
on the ball,

alert and efficient or effective:
If you don’t get on the ball, you’ll be fired.
indicating intelligence or ability:
The tests show your students don’t have much on the ball. The new manager has a lot on the ball.

play ball,

to begin or continue playing a game.
to start or continue any action.
to work together; cooperate:
union leaders suspected of playing ball with racketeers.

run with the ball, to assume responsibility or work enthusiastically:
If management approves the concept, we’ll run with the ball.
start the ball rolling, to put into operation; begin:
The recreation director started the ball rolling by having all the participants introduce themselves.
a large, usually lavish, formal party featuring social dancing and sometimes given for a particular purpose, as to introduce debutantes or benefit a charitable organization.
Informal. a thoroughly good time:
Have a ball on your vacation!
Contemporary Examples

And, with a swift kick to the balls, the titans of capitalism were joined by—or unseated by—young upstarts in flip-flops.
McCain’s Brilliant Campaign, Four Years Too Late Caroline Marks November 3, 2008

The government, they shouted whenever and wherever possible, lacked the guts—the balls, why not?
India’s Twisted Conscience on Terrorism Dilip D’Souza February 15, 2013

Do you have the balls to ask him about that—if you cleared it with him first maybe?
After Hours with Jimmy Fallon Kevin Sessums February 23, 2009

In related news, if my grandmother had balls she’d be my grandfather.
How Terrible Is Christmas? Megan McArdle December 25, 2012

I was totally unprepared and only got one arm around, the other was left straggling and I accidentally cupped his balls.
Penis Beakers and Constipated Dolls: What Mothers REALLY Want To Know Tom Sykes October 10, 2013

Historical Examples

Their pupils dilated, their balls bulged as if about to burst from the sockets.
Out of the Depths Robert Ames Bennet

We stuffed the pink dainties with mint, and baked them in balls of clay.
In the Valley Harold Frederic

We give an account of these two balls as it appeared in a newspaper of that period.
Old Taverns of New York William Harrison Bayles

While he yet spake, two balls entered his heart, and he fell dead.
The Works of Whittier, Volume VI (of VII) John Greenleaf Whittier

A little while ago, every letter to Isabella brought an account of fresh gaieties; dinners at Mr. Cole’s, or balls at the Crown.
Emma Jane Austen

plural noun
the testicles
by the balls, so as to be rendered powerless
nonsense; rubbish
courage; forcefulness
interjection
an exclamation of strong disagreement, contempt, annoyance, etc
noun
a spherical or nearly spherical body or mass: a ball of wool
a round or roundish body, either solid or hollow, of a size and composition suitable for any of various games: football, golf, billiards, etc
a ball propelled in a particular way in a sport: a high ball
any of various rudimentary games with a ball: to play ball
(cricket) a single delivery of the ball by the bowler to the batsman
(baseball) a single delivery of the ball by a pitcher outside certain limits and not swung at by the batter

a solid nonexplosive projectile for a firearm Compare shell (sense 6)
such projectiles collectively

any more or less rounded part or protuberance: the ball of the foot
(slang) a testicle See balls
(vet science) another word for bolus
(horticulture) the hard mass of roots and earth removed with the rest of the plant during transplanting
(Austral) ball of muscle, a very strong, fit, or forceful person
have the ball at one’s feet, to have the chance of doing something
keep the ball rolling, to maintain the progress of a project, plan, etc
(informal) on the ball, alert; informed
(informal) play ball, to cooperate
set the ball rolling, start the ball rolling, to open or initiate (an action, discussion, movement, etc)
the ball is in your court, you are obliged to make the next move
verb
(transitive) to make, form, wind, etc, into a ball or balls: to ball wool
(intransitive) to gather into a ball or balls
(taboo, slang, mainly US) to copulate (with)
noun
a social function for dancing, esp one that is lavish or formal
(informal) a very enjoyable time (esp in the phrase have a ball)
noun
John. died 1381, English priest: executed as one of the leaders of the Peasants’ Revolt (1381)
n.

“testicles,” early 14c., from plural of ball (n.1). See also ballocks. Meaning “courage, nerve” is from 1928. Balls to the wall, however, probably is from World War II Air Forces slang, from the ball that topped the aircraft throttle, thrust to the bulkhead of the cockpit to attain full speed. Ball-busting “difficult” is first recorded 1944; ball-buster, disparaging for “dominant female,” is from 1974.
n.

“round object,” Old English *beal, from or corresponding to Old Norse bollr “ball,” from Proto-Germanic *balluz (cf. Old High German ballo, German Ball), from PIE root *bhel- (2) “to blow, inflate, swell” (see bole).

Meaning “testicle” is from early 14c. Ball of the foot is from mid-14c. A ball as an object in a sports game is recorded from c.1200; To have the ball “hold the advantage” is from c.1400. To be on the ball is 1912, from sports. Ball-point pen first recorded 1946. Ball of fire when first recorded in 1821 referred to “a glass of brandy;” as “spectacularly successful striver” it is c.1900.

“dancing party,” 1630s, from French, from Old French baller “to dance,” from Late Latin ballare “to dance,” from Greek ballizein “to dance, jump about” (see ballistics). Hence, “very enjoyable time,” 1945, American English slang, perhaps back to 1930s in black slang.
v.

1650s, “make into a ball,” from ball (n.1). Sense of “to become like a ball” is 1713; that of “to copulate” is first recorded 1940s in jazz slang, either from the noun sense of “testicle” or “enjoyable time” (from ball (n.2)). Related: Balled; balling.

ball (bôl)
n.

A spherical object or mass.

A bezoar.

A large pill or bolus.

interjection

An exclamation of incredulity, disappointment, or disgust (1940s+)
of disbelief, contempt, etc: That story is just such patent balls that I’ve written a letter/ He was talking high-minded balls. Twaddle! (chiefly British 1880s+)

noun

The testicles (1300s+)
Courage; nerve; guts: They have balls but not soul/ I admire a woman with the balls to snowboard (1920s+)
Nonsense; poppycock •Frequently an

Related Terms

blue balls, bust one’s ass, the cat’s meow, does howdy doody have wooden balls, cold enough to freeze the balls off a brass monkey, gripe one’s ass, have brass balls, have someone by the balls, have the world by the balls, not get one’s balls in an uproar, put balls on

noun

A testicle; nut (1300s+)
A dollar, esp a silver dollar •Attested in the late 1980s as high-school student use (1890s+ Underworld)
The game of baseball (1860s+)

verb

To do the sex act; copulate with; screw (1940s+ Jazz musicians)
To have an especially good time; enjoy oneself in a relaxed and uninhibited way: A good-time town, where everybody comes to ball (1940s+ Black)

Related Terms

ball up, beanball, butterfly ball, cannonball, carry the load, fireball, forkball, foul ball, get on the ball, go for the long ball, goofball, gopher ball, greaseball, greedball, have a ball, junk-ball, keep one’s eye on the ball, meatball, not get one’s balls in an uproar, nutball, oddball, on the ball, play ball, play catch-up, sleazebag, slimebag, softball, sourball, that’s the way the ball bounces

ball and chain
ball of fire
ball up