To tie or fasten behind.

simple past tense and past participle of tie back

(slang, chiefly US) Father of child in common, particularly one who did not marry the mother and provides little or no support for the mother and child.

(transitive) To fall back on.

(transitive) To turn to as a substitute.

A bottle equipped with a teat, used for feeding infants.

(rugby) a back whose primary job is to create space for the outside backs outside him, i.e. the scrum-half, the fly-half and the inside centre.

(rugby) Any of a group of players positioned between the half-backs and the full-backs; consists of the left wing, the inside centre, the outside centre and the right wing

(rugby) the scrum-half and the fly-half

(rugby) a back whose primary job it is to exploit space created by the inside backs, i.e. the outside centre, both wingers, and the full back