Definition of o'clock
1 : according to the clock the time is three o'clock
2 —used for indicating position or direction as if on a clock dial that is oriented vertically or horizontally an airplane approaching at six o'clock
Explore M-W
Origin and Etymology of o'clock
contraction of of the clock
First Known Use: 1535
O'CLOCK Defined for English Language Learners
O'CLOCK Defined for Kids
o'clock
playDefinition of o'clock for Students
: according to the clock The time is one o'clock.
Learn More about o'clock
-
See words that rhyme with o'clock Spanish Central: Translation of o'clock Nglish: Translation of o'clock for Spanish speakers
Seen and Heard
What made you want to look up o'clock? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!