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Greenwich Mean Time

noun [U]
 
 
/ˌɡren.ɪtʃˈmiːn.taɪm/ (abbreviation GMT)

Definition

the time at Greenwich, Greater London, that world time zones are based on → See also British Summer TimeDays and times of day
(Definition of Greenwich Mean Time noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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