O o


    • US Pronunciation
    • US IPA
    • UK Pronunciation
    • UK IPA
    • [uh-klok]
    • /əˈklɒk/
    • /əˈklɒk/
    • US Pronunciation
    • US IPA
    • [uh-klok]
    • /əˈklɒk/

Definitions of o'clock word

  • adverb o'clock of, by, or according to the clock (used in specifying the hour of the day): It is now 4 o'clock. 1
  • adverb o'clock according to a method for indicating relative position whereby a plane in space is considered to be numbered as a clock's face, with 12 o'clock considered as directly ahead in horizontal position or straight up in vertical position. 1
  • adverb o'clock on the hour 1
  • adverb o'clock You use o'clock after numbers from one to twelve to say what time it is. For example, if you say that it is 9 o'clock, you mean that it is nine hours after midnight or nine hours after midday. 0
  • adverb o'clock used after a number from one to twelve to indicate the hour of the day or night 0
  • adverb o'clock used after a number to indicate direction or position relative to the observer, twelve o'clock being directly ahead or overhead and other positions being obtained by comparisons with a clock face 0

Information block about the term

Origin of o'clock

First appearance:

before 1710
One of the 50% oldest English words
First recorded in 1710-20; See origin at o', clock1

Historical Comparancy

Parts of speech for O'clock


o'clock popularity

A common word. It’s meaning is known to most children of preschool age. About 71% of English native speakers know the meaning and use the word.
This word is included in each student's vocabulary. Most likely there is at least one movie with this word in the title.

Synonyms for o'clock

noun o'clock

  • hour — a period of time equal to one twenty-fourth of a mean solar or civil day and equivalent to 60 minutes: He slept for an hour.

See also

Matching words

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