A defensive wall or rampart.
A defense or safeguard.
A breakwater.
Any means of defence or security.
The planking or plating along the sides of a nautical vessel above her gunwale that reduces the likelihood of seas washing over the gunwales and people being washed overboard.
To fortify something with a wall or rampart.
To provide protection of defense for something.
An offensive back who receives the snap (hike) and then blocks the defense from crossing the line of scrimmage; a blocking back.
An offensive back whose primary job is to pass the ball in a play.
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.