Word.ws English Dictionary

twenty-four-hour clock

UK/ˌtwɛntiˈfɔːɹˌaʊə ˈklɒk/US/ˌtwɛntiˈfɔɹˌaʊəɹ ˈklɔk/

twenty-four-hour clock is the alternative form of 24-hour clock.

Meaning of 24-hour clock

Noun

24-hour clock (plural 24-hour clocks)

  1. A timekeeping convention in which the 24 hours of the day are treated as a single period rather than two sets of 12 hours, with the result that midnight is indicated as 00:00 (or sometimes 24:00), and the hours from 1:00 to 11:00 p.m. as 13:00 to 23:00.
    • Twenty-four hour clock time is gaining in favor.1893, “Time and Its Landmarks”, in J. C. Thomas, editor, Manual of Useful Information […] (The Working Teachers’ Library; V), Chicago, Ill.: The Werner Company, →OCLC, page 41

Forms of twenty-four-hour clock

pluraltwenty-four-hour clocks

Origin of twenty-four-hour clock

From twenty-four + hour + clock.

Words that rhyme with twenty-four-hour clock

48 more rhymesFewer rhymes

Questions about twenty-four-hour clock

What is twenty-four-hour clock the alternative form of?
Twenty-four-hour clock is the alternative form of 24-hour clock.
How do you pronounce twenty-four-hour clock?
Twenty-four-hour clock is pronounced /ˌtwɛntiˈfɔːɹˌaʊə ˈklɒk/ (UK).

Words near twenty-four-hour clock in the dictionary

  1. twenty-four hour clocks
  2. twenty-four hour day
  3. twenty-four hour days
  4. twenty-four hours a day
  5. twenty-four seven
  6. twenty-four-hour clock
  7. twenty-four-hour clocks
  8. twenty-four/seven
  9. twenty-fourmo
  10. twenty-fourmos
  11. twenty-fours

Source and license

Adapted from Wiktionary: twenty-four-hour clock (page history and authors); 24-hour clock (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “twenty-four-hour clock.” Word.ws, https://word.ws/twenty-four-hour_clock. Based on Wiktionary, CC BY-SA 4.0.