Meaning of “rush hour” in the English Dictionary

american-english dictionary

(Definition of “rush hour” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"rush hour" in American English

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rush hournoun [ C ]

us /ˈrʌʃ ˌoʊr/

one of the busy parts of the day, either when people are traveling to work in the morning or when they are traveling home from work in the evening:

Take alternate routes during the morning rush hour.

(Definition of “rush hour” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"rush hour" in Business English

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one of the very busy times of the day on roads, trains, etc., in the morning when people are travelling to work and in the evening when people are going home:

in the/during rush hour It takes twice as long to drive to work during rush hour.
The rush hour traffic was slow.

(Definition of “rush hour” from the Cambridge Business English Dictionary © Cambridge University Press)