o'clock Meaning, definition in Cambridge English Dictionary
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Meaning of "o'clock" - English Dictionary

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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.
Translations of “o'clock”
in Chinese (Traditional) (用於數字1至12後表示整點)…點鐘…
in Chinese (Simplified) (用于数字1至12后表示整点)…点钟…
(Definition of o'clock from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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