Definition of "oom"

oom

/ʊəm/

noun
plural ooms
1. (South Africa) An older man, especially an uncle. (Frequently as a respectful form of address.)
  Quotations
  He raised his glass. ‘Here's to you, Oom Ben,’ he said. ‘Give them hell.’
  1979, André Brink, A Dry White Season, Vintage, published 1998, page 73