A Rocket

1. A rocket engine.
2. (military) A non-guided missile propelled by a rocket engine.
3. A vehicle propelled by a rocket engine.
4. A rocket propelled firework, a skyrocket
5. (slang) An ace (the playing card).
6. (military slang) An angry communication (such as a letter or telegram) to a subordinate.
7. A blunt lance head used in jousting.
8. (figuratively) Something that shoots high in the air.
9. (Scotland, slang) A stupid or crazy person.