Quick definitions from WordNet (quarterback)
▸ noun: 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")
▸ noun: (football) the person who plays quarterback
▸ verb: play the quarterback
▸ Also see quarterback
▸ noun: 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")
▸ noun: (football) the person who plays quarterback
▸ verb: play the quarterback
▸ Also see quarterback