Word.ws English Dictionary

twenty-four hour clock

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

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.

Words near twenty-four hour clock in the dictionary

  1. twenty-five-thousanders
  2. twenty-five/eight
  3. twenty-foot equivalent unit
  4. twenty-foot equivalent units
  5. twenty-four
  6. twenty-four hour clock
  7. twenty-four hour clocks
  8. twenty-four hour day
  9. twenty-four hour days
  10. twenty-four hours a day
  11. twenty-four seven

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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