Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “o'clock”

See all translations

o'clock

adverb 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)
What is the pronunciation of o'clock?
Add Cambridge dictionaries to your browser to your website

Definitions of “o'clock” in other dictionaries

Word of the Day

thug

a man who acts violently, especially to commit a crime

Word of the Day

The way we move (Verbs for walking and running)

by Kate Woodford,
March 25, 2015
​​​ This week we’re looking at interesting ways to describe the way that people move. Most of the verbs that we’ll be considering describe how fast or slow people move. Others describe the attitude or state of mind of the person walking or running. Some describe both. Starting with verbs for walking slowly,

Read More 

crossfit noun

March 23, 2015
high-intensity strength training Two women in strappy dresses discussed how much weight they could snatch

Read More