From Wiktionary





A cap.
  1. (countable) A cap is a small hat.
    He was wearing blue jeans and a ball cap.
  2. (countable) A cap is a cover that closes the end of something, such as a bottle or pipe.
    First we need to remove the cap, then we can drain the fluid from the tank.
  3. (countable) A cap is a limit.
    The government should place a cap on spending for next year.
  4. (countable) A cap is small piece of explosive that is used to set off larger explosives.
  5. (countable); (botany) A cap is the top part of a mushroom.
  6. (countable) A cap is a crown for covering a tooth.
  7. (countable) A cap is the summit (top) of a mountain.
  8. (countable) A cap is a small amount of gunpowder that is used to set off a toy gun.
  9. (slang) (countable) If you "pop a cap" on someone, you shoot them with a gun.
    You best watch out or I'll bust a cap in your ass.
  10. (sports) A cap is an international appearance of a player in a team.

Related words[change]


Plain form

Third-person singular

Past tense

Past participle

Present participle

  1. (transitive) If you cap something, you put a cap on it.
    We need to cap that pipe before turning the water back on.
  2. (transitive) If you cap something, you set an upper limit on it.
  3. (transitive) If something caps something, it fits on it and is a cap for it.
  4. (slang); (transitive) If you cap someone, you shoot that person.
  5. (transitive) If you cap something, you lie over or on top of something.
  6. (transitive) If you cap something, you surpass or outdo something.