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English definition of “rush hour”

rush hour

noun [C usually singular]    
B2 the busy part of the day when towns and cities are crowded , either in the morning when people are travelling to work , or in the evening when people are travelling home : rush hour traffic Traffic jamsDays and times of dayWorking hours and periods of workWork, working and the workplace
(Definition of rush hour noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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