intransitive verb
Definition: To register the time of arrival or departure, especially in a workplace setting.
Example: She clocks in at 9 A.M. every day.
noun
Definition: A device used to measure and show the time, usually with a face and hands or a digital display.
Example: I looked at the clock to see how much time I had left before my meeting.
transitive verb
Definition: To measure or record the time taken by an event or activity using a device.
Example: The coach decided to clock the runners during the race to see who was the fastest.