The fleshy or muscular part of the side of an animal,
between the ribs and the hip. See Illust. of Beef.

The side of an army, or of any division of an army, as of a
brigade, regiment, or battalion; the extreme right or left; as, to
attack an enemy in flank is to attack him on the side.

That part of a bastion which reaches from the curtain to the
face, and defends the curtain, the flank and face of the opposite
bastion; any part of a work defending another by a fire along the
outside of its parapet.

The side of any building.

That part of the acting surface of a gear wheel tooth that
lies within the pitch line.

To stand at the flank or side of; to border upon.

To overlook or command the flank of; to secure or guard
the flank of; to pass around or turn the flank of; to attack, or
threaten to attack; the flank of.

To border; to touch.