In brewing and malt vinegar manufacture, a cistern which receives the wort.

(intransitive, proscribed) To lie down on one's back; to lie back. / (informal, transitive) To relax, such as on vacation.

(US) Outside at the back.

The part of a restaurant etc. not open to the public.

(US, American football) In American football, a back – usually a running back – that gets the most carries and most yardage in a game.

(informal) A coward.

Alternative form of backshell

a long ridge between Guildford and Farnham in Surrey, England, traversed for much of its length by the A31 trunk road.

A sharp reply given to someone.

(informal) The act of patting oneself or someone else on the back.