(transitive) To reverse (a vehicle) from a confined space. / (intransitive) To withdraw from something one has agreed to do. / (transitive) To dare (someone) to not withdraw from a challenge.

(American football) A player for the team in possession of the ball who lines up behind the line of scrimmage at the start of a play.

relaxed and easy-going; an absence of stress or worry

present participle of run back

A back issue of a magazine, etc. / Anything considered old-fashioned.

Alternative spelling of back-formation.

(idiomatic, intransitive) To move backwards, especially for a vehicle to do so. / (idiomatic, transitive) To move a vehicle backwards. / (idiomatic, intransitive) To undo one's actions.

(music) when bass strings are slapped rather plucked individually.

(chiefly Britain, Ireland and Australia, informal, with "the"; usually with "in", sometimes "at" or "to") A very remote place.

(transitive) To delay or obstruct. / (transitive) To remove from or allow distance. / (transitive) To install or position behind a boundary or surface, or in a recess.