Definition of gas cap in English:

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gas cap

noun

North American
A cap that closes the end of the pipe leading to the fuel tank of a motor vehicle or aircraft: my gas cap wasn’t on tight enough
More example sentences
  • The locking gas cap is making a big comeback, with many dealers reporting that they are simply sold out of the item.
  • I pulled into a self service station and removed the gas cap.
  • Letting out a nervous laugh I replaced the gas pump and screwed in my gas cap.
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