The last row of seats in a theater or any group of seats. / A row near the back of the theater or group of seats. / (rugby) The row of players in a scrum, consisting of two flankers and a number eight.

The cover on the opposite side of the front cover of a book, magazine, etc; back of the book; associated with sports pages in publications.

(intransitive) To move in a direction opposite to that which one is facing, keeping one's attention on the thing in front being avoided.

(Britain) A group of musicians who accompany an artist at a live performance or on a recording. This can either be an established group, or else an ad hoc group assembled for the purpose.

plural of back payment

(slang) Remote countryside.

(transitive) To reverse a vehicle onto something. / (transitive) To overlook something from the rear.

(literally) To move backwards away from something. / (idiomatic) To become less aggressive, particularly when one had appeared committed to act. / (idiomatic) To lower the setting of.

(idiomatic) To reply impertinently; to talk back. / To reply to a question at a later time. / (computing) To issue echo characters, protocol responses, reflexive connection requests, etc.

(film) A cinematic technique in which live action is filmed in front of a screen on which the background action or a background scene is projected. / tomographic reconstruction