The noun clock has 1 sense (first 1 from tagged texts)
1. (15) clock -- (a timepiece that shows the time of day)
Overview of verb clock
The verb clock has 1 sense (first 1 from tagged texts)
1. (1) clock, time -- (measure the time or duration of an event or action or the person who performs an action in a certain period of time; "he clocked the runners")