| 1. | a spherical or approximately spherical body or shape; sphere: He rolled the piece of paper into a ball. |
| 2. | a round or roundish body, of various sizes and materials, either hollow or solid, for use in games, as baseball, football, tennis, or golf. |
| 3. | a game played with a ball, esp. baseball: The boys are out playing ball. |
| 4. | Baseball. a pitched ball, not swung at by the batter, that does not pass over home plate between the batter's shoulders and knees. |
| 5. | Military.
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| 6. | any part of a thing, esp. of the human body, that is rounded or protuberant: the ball of the thumb. |
| 7. | a round mass of food, as of chopped meat, dough, or candy. |
| 8. | Slang: Vulgar. a testis. |
| 9. | balls, Slang: Vulgar.
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| 10. | bolus (def. 1). |
| 11. | Horticulture. a compact mass of soil covering the roots of an uprooted tree or other plant. |
| 12. | Literary. a planetary or celestial body, esp. the earth. |
| 13. | 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. |
| 14. | to make into a ball (sometimes fol. by up): The children were balling up snow to make a snowman. |
| 15. | to wind into balls: to ball cotton. |
| 16. | Slang: Vulgar. to have sexual intercourse with. |
| 17. | to form or gather into a ball: When the spun sugar balls, the candy has cooked sufficiently. |
| 18. | Slang: Vulgar. to have sexual intercourse. |
| 19. | ball up, Slang. to make or become utterly confused; muddle: The records had been all balled up by inefficient file clerks. |
| 20. | ball the jack, Slang.
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| 21. | carry the ball, to assume the responsibility; bear the burden: You can always count on him to carry the ball in an emergency. |
| 22. | drop the ball, to make a mistake or miss an opportunity at a critical moment. |
| 23. | 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. |
| 24. | on the ball,
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| 25. | play ball,
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| 26. | run with the ball, to assume responsibility or work enthusiastically: If management approves the concept, we'll run with the ball. |
| 27. | start the ball rolling, to put into operation; begin: The recreation director started the ball rolling by having all the participants introduce themselves. |

ball
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drop the ball
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ball (bôl)
n.
A spherical object or mass.
A bezoar.
A large pill or bolus.
drop the ball
Make an error; miss an opportunity. For example, She really dropped the ball when she forgot to call back, or He dropped the ball, turning down their offer. This expression comes from sports where a player who fails to catch a ball is charged with an error. Its use for more general kinds of mistakes dates from about 1950.