What is the meaning of Quarterback?

An offensive back whose primary job is to pass the ball in a play.

An offensive back who receives the snap (hike) and then blocks the defense from crossing the line of scrimmage; a blocking back.

A position just behind the forwards, or one who plays this position.

To play the position of quarterback.

To lead a team or group; to be primarily responsible for some group project or activity.

A quarterback.

quarterback

quarterback

Source: wiktionary.org