Definition of clock
- working against the clock
- trial races against the clock
First Known Use: 14th centurySee Words from the same year
He clocked 3 hours and 15 minutes in his last marathon.
His fastest pitch was clocked at 91 miles per hour.
The cop said she clocked me going 95 miles per hour.
I was so angry I wanted to clock him.
: to measure the amount of time it takes for (a person) to do something or for (something) to be completed
: to finish a race in (an amount of time)
: to measure or show (the speed of something) with a measuring device
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