halfback

Short definition from Wiktionary

Noun

1. 1
   Any of various positions on the field of play between the forwards and the fullbacks.
2. 2
   A player who occupies one of these positions: 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.
3. 3
   A player who occupies one of these positions: A defensive back whose primary jobs are to cover the slotback on passing plays and prevent running plays from going to the outside.
4. 4
   A player who occupies one of these positions: A player in the halfback position, with both offensive and defensive roles.
5. 5
   A player who occupies one of these positions: One of three players (the centre halfback and two halfback flankers) on the line between the centre line and the fullback line.
6. 6
   A player who occupies one of these positions: The player who feeds the ball into the scrum, and receives the ball as it emerges from the back of the scrum.
7. 7
   A person from the northern United States who moves to Florida, but then due to the heat or other issues, moves again to a more temperate climate, primarily the Carolinas.

Verb

1. 1
   To play in the position of halfback.