o'clock Meaning in the Cambridge English Dictionary
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Meaning of “o'clock” in the English Dictionary

"o'clock" in British English

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o'clockadverb

uk   /əˈklɒk/  us   /-ˈklɑːk/
A1 used after a ​number from one to twelve to say the ​time when it is ​exactly that ​hour: It's two o'clock. He called me at four o'clock in the ​morning.
More examples
  • Make ​sure you're there by five o'clock.
  • I always get up at six o'clock.
(Definition of o'clock from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"o’clock" in American English

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o’clockadverb [not gradable]

 us   /əˈklɑk/
used after a ​number from one to twelve to ​state the ​time: She called at nine o’clock this ​morning.
(Definition of o’clock from the Cambridge Academic Content Dictionary © Cambridge University Press)
Translations of “o'clock”
in Vietnamese chỉ giờ…
in Spanish hora…
in Malaysian pukul…
in Thai นาฬิกา (เวลา)…
in French heure(s)…
in German …Uhr…
in Indonesian pukul…
in Chinese (Simplified) (用于数字1至12后表示整点)…点钟…
in Chinese (Traditional) (用於數字1至12後表示整點)…點鐘…
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