cannonball

noun Also cannon ball.

1. a missile, usually round and made of iron or steel, designed to be fired from a cannon.
2. Tennis. a served ball that travels with great speed and describes little or no arc in flight.
3. anything that moves with great speed, as an express train.

adjective

4. made from a curled-up position with the arms pressing the knees against one’s chest: a cannonball dive.
5. moving at great speed: a train known as a cannonball express.

noun

1. JulianCannonball, 1928–75, American jazz saxophonist.

noun

1. a projectile fired from a cannon: usually a solid round metal shot
2. tennis
   1. a very fast low serve
   2. (as modifier)a cannonball serve
3. a jump into water by a person who has his arms tucked into the body to form a ball

verb (intr)

4. (often foll by along, etc) to rush along, like a cannonball
5. to execute a cannonball jump

adjective

6. very fast or powerful