1. a player positioned on the side of a formation in sports, especially football or rugby
Usage: sports
2. a soldier or military unit positioned on the flank of a main force
Usage: military
3. something that is positioned at the side or edge of something else

Examples

• The flanker caught the pass and ran toward the sideline.
• Coach moved him from tight end to flanker position.
• The flanker units protected the main army from surprise attacks.
• Enemy flankers were spotted moving through the woods.
• The building’s flanker towers provided additional security.
• She positioned the flanker pieces on either side of the centerpiece.