clock - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “clock”

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noun [C]  us   /klɑk/
a device for measuring and showing time, often placed on a surface or attached to a wall: an alarm clock The clock is about ten minutes fast/slow (= it shows a later/earlier time than it should). Cleveland tied the game with five seconds on the clock (= still available).


verb [T]  us   /klɑk/
to use an amount of time, esp. as measured by a clock: She clocked the fastest time in practice runs for the women’s downhill skiing event.
(Definition of clock from the Cambridge Academic Content Dictionary © Cambridge University Press)
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