clock definition, meaning - what is clock in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “clock”

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clock

noun uk   /klɒk/  us   /klɑːk/

clock noun (TIME)

A1 [C] a device for measuring and showing time, usually found in or on a building and not worn by a person: We have an antique clock on our mantelpiece. The town-hall clock says (= shows that the time is) nine o'clock. I think the kitchen clock is fast/slow (= is showing a later/earlier time than it should). The clock began to strike twelve. She set her clock (= put it to the right time) by the time signal on the radio.turn the clocks back (UK also put the clocks back, US also set the clocks back) to change the time on your clocks to an hour earlier, at an officially chosen time of year: Don't forget to turn the clocks back tonight.turn the clocks forward (UK also put the clocks forward, US also set the clocks ahead) to change the time on your clocks to an hour later, at an officially chosen time of year
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clock noun (SPEED)

the clock [S] a speedometer (= a device that measures speed): I was only doing 30 mph on the clock. a milometer (= a device for recording distance travelled): My car's only got 10,000 miles on the clock.

clock

verb [T] uk   /klɒk/  us   /klɑːk/

clock verb [T] (TIME)

to take a particular time exactly to do or complete something: He clocked ten seconds in the 100 metres (= he ran it in ten seconds).

clock verb [T] (SPEED)

to show or reach a particular speed or distance on a measuring device: [+ -ing verb] The police clocked him doing 80 mph in a 50 mph area. Jim's car has clocked (up) (= travelled) 40,000 miles in less than two years.

clock verb [T] (HIT)

informal to hit someone, especially on the head or face: Then the other guy turned round and clocked him one (= hit him).
(Definition of clock from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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