rush hour Definition in the Cambridge English Dictionary
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Definition of “rush hour” - English Dictionary

Definition of "rush hour" - American English Dictionary

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rush hournoun [C]

 us   /ˈrʌʃ ˌoʊr/
one of the ​busyparts of the ​day, either when ​people are ​traveling to ​work in the ​morning or when they are ​travelinghome from ​work in the ​evening: Take ​alternateroutes during the ​morning rush hour.
(Definition of rush hour from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "rush hour" - British English Dictionary

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rush hournoun [C usually singular]

uk   us  
B2 the ​busypart 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 ​travellinghome: rushhourtraffic
(Definition of rush hour from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "rush hour" - Business English Dictionary

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rush hournoun [C, usually singular]

uk   us  
one of the very ​busytimes 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)
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