Halfback

Full definition of halfback

Noun

1. (American football) An offensive back whose primary jobs are to carry the ball on running plays and to serve as a receiver or blocker on passing plays.
2. (Canadian football) A defensive back whose primary jobs are to cover the slotback on passing plays and prevent running plays from going to the outside.
3. (field hockey) A position in field hockey, with both offensive and defensive roles.