Definition of half back noun from the Oxford Advanced Learner's Dictionary

     

    half back

     noun
    noun
    BrE BrE//ˈhɑːf bæk//
     
    ; NAmE NAmE//ˈhæf bæk//
     
    (also half)(North American English halfback) Rugby, American football
     
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  1. 1[countable] one of the defending players in hockey or rugby whose position is between those who play at the front of a team and those who play at the back See related entries: Rugby
  2. 2(also tailback) [countable] one of the two attacking players in American football whose position is behind the quarterback and beside the full backs See related entries: American football
  3. 3(also tailback) [uncountable] the position a half back plays at