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English definition of “time zone”

time zone

noun [C] uk   us  
one of many equal parts into which the world is divided. In any place within each part, the particular point in the day is the same, and is an hour in front of or behind that in the parts on either side: If you go from New York to London, you cross five time zones.Maps and map-making
(Definition of time zone from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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