1. measured the time or speed of something
2. hit or struck someone
Usage: informal
3. noticed or observed something
Usage: informal

Examples

• The runner was clocked at 9.8 seconds in the 100-meter dash.
• Police clocked the speeding car at 85 mph.
• He clocked his opponent with a right hook.
• She clocked him looking at her phone.
• The coach clocked each swimmer’s lap time.
• I clocked that suspicious behavior immediately.
• The radar gun clocked the baseball at 95 mph.