English

Definition of old boy noun from the Oxford Advanced Learner's Dictionary

  1. 1old boy
    BrE
     
    ; NAmE
     
    a man who used to be a student at a particular school, usually a private one They’re having an old boys’ reunion next month.
  2. 2old boy
    BrE
     
    ; NAmE
     
    (informal, especially British English) an old man The old boy next door has died. See related entries: Old age
  3. see also old girl
    Idioms (British English, informal) the practice of men who went to the same school using their influence to help each other at work or socially Recruiting staff used to be done by means of the old boy network.
See the Oxford Advanced American Dictionary entry: old boy