| Noun | 1. | signal caller - (football) the person who plays quarterbackfootball, football game - any of various games played with a ball (round or oval) in which two teams try to kick or carry or propel the ball into each other's goal back - (football) a person who plays in the backfield |
| 2. | signal caller - (American football) the position of the football player in the backfield who directs the offensive play of his team; "quarterback is the most important position on the team" back - (American football) the position of a player on a football team who is stationed behind the line of scrimmage football team, eleven - a team that plays football |