Noun

• S: (n) quarterback, signal caller, field general ((football) the person who plays quarterback)
• S: (n) quarterback, signal caller, field general ((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"

Verb

• S: (v) quarterback (play the quarterback)
• domain category
• direct hypernym / inherited hypernym / sister term
• derivationally related form
• sentence frame