Definition of o'clock
- the time is three o'clock
- an airplane approaching at six o'clock
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'o'clock.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use: 1535See Words from the same year
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to lessen the seriousness or strength of
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