a military detachment to protect the rear of a main force or body; rear-guard.

(fig.) a support; help or assistance given in auxiliary capacity.

a supporting, upholding (another's cause, policy, etc.).

to fall on the back of.

to follow in servility.

to run away (as from a battle field or shirking one's responsibility, etc.).

to wait for a chance to harm, deceive, etc.

to feel deep, acute sorrow or distress; to grieve.

to be born following another; to be born as a younger brother or sister to).