gas cap

noun

The cap that closes a gas tank and may be opened to refill it.

Similar
petrol cap
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Meanings

noungas cap (plural gas caps)

plural gas caps

  1. USautomotiveThe cap that closes a gas tank and may be opened to refill it.

    Synonyms: petrol cap

Synonyms & antonyms

nounThe cap that closes a gas tank and may be opened to refill it.

Similar
petrol cap
Also see
filler cappetrol cap
Cite this entry
APA

gas cap. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/gas%20cap

MLA

“gas cap.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/gas%20cap. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “gas cap,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/gas%20cap.

Source: gas cap on Wiktionary, CC BY-SA 4.0.