1. a player in American football who lines up behind the quarterback and is typically used for running and blocking
Usage: American football
2. a defensive player in soccer who plays near their own goal
Usage: soccer; association football

Examples

• The fullback carried the ball for a five-yard gain.
• Coach decided to use the fullback as a lead blocker on the play.
• The team’s fullback scored two touchdowns in the championship game.
• The fullback cleared the ball away from the goal area.
• She played fullback for the women’s soccer team.
• The fullback made a crucial tackle to prevent a goal.