What is the meaning of Flanker?

A player who plays in the back row of the scrum.

A wide receiver who lines up behind the line of scrimmage.

A fortification or soldier projecting so as to defend another work or to command the flank of an assailing body.

To defend by lateral fortifications.

To attack sideways.

indefinite plural of flanke

imperative of flankere

flanker

indefinite plural of flanke

imperative of flankere

indefinite plural of flank

Source: wiktionary.org