"clocks" in the noun sense
1. clock
a timepiece that shows the time of day
"clocks" in the verb sense
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"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License