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English definition of “office hours”

office hours

noun [plural]    
the hours during the day when people who work in offices are usually at work: I'll have to do it outside/out of (= before or after) office hours. Their phone lines are only open during office hours.Days and times of dayWorking hours and periods of workWork, working and the workplace US (UK surgery [U]) the times during the day when you can go to see a doctor or dentist at his or her office: Many doctors have evening office hours.
(Definition of office hours noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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