1. an instrument that shows the time

1. to measure the time or speed of something
2. to record a time of arrival or departure at work

Examples

• The clock on the wall shows three o’clock.
• She looked at her alarm clock and realized she was late.
• The runner was clocked at under four minutes for the mile.
• Police clocked the car going 80 mph in a 55 mph zone.
• Don’t forget to clock in when you arrive at work.
• He clocked out at 5 PM and went home.
• The old grandfather clock chimed every hour.