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Definition of: Clock
Our photo definition of clock 
(klok) noun
1. An instrument for measuring and indicating time by mechanical movements; a timepiece.
2. Any clocklike, mechanical, registering device for recording distance, output, etc.
—what o'clock, six o'clock, etc. See O′CLOCK.
—v.t. To determine the rate of speed of an automobile or of any racing event by means of a stopwatch. [<MDu. clocke <OF cloque, cloche bell <Med. L cloca. Doublet of CLOAK.]
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