/ ˈhɑːfbæk; NAmE ˈhæf-/ (also half ) noun
1.
[ C ] one of the defending players in football ( soccer ), hockey or rugby whose position is between those who play at the front of a team and those who play at the back
2.
[ C ] one of the two attacking players in American football whose position is behind the quarterback and beside the fullbacks
3.
[ U ] the position a halfback plays at