WordReference Random House Learner's Dictionary of American English © 2014
quar•ter•back /ˈkwɔrtɚˌbæk/USA pronunciation
Sport[countable] a back in football who usually lines up immediately behind the center and directs the offense of the team.
Sport[uncountable] the position played by this back.
to direct the offense of (a team): [~ + object]He quarterbacked his team to victory.[no object]He should be quarterbacking again in no time.
Collins Concise English Dictionary © HarperCollins Publishers::
quarterback /ˈkwɔːtəˌbæk/ n US Canadian
- a player in American or Canadian football, positioned usually behind the centre, who directs attacking play
'quarterback' also found in these entries: