Definition of office hours noun from the Oxford Advanced American Dictionary

     

    office hours

     noun
    noun
     
    [plural]
     
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  1. 1the time when people in offices are normally working Our telephone lines are open during normal office hours.
  2. 2 the time during which a doctor or dentist is available to see patients
  3. 3the time when a professor meets with students in his or her office Professor Chen's office hours are Tuesday and Thursday from 3 to 5 p.m.
See the Oxford Advanced Learner's Dictionary entry: office hours