To return to a place or state after having been there at a previous time.
We were getting cold so we decided to go back.
Humans had discovered fire and there was no going back.
2 more examples
He tried to persuade Cicely to stay away from the ball-room for a fourth dance. […] But she said she must go back, and when they joined the crowd again […] she found her mother standing up before the seat on which she had sat all the evening searching anxiously for her with her eyes, and her father by her side.1909 September 9, Archibald Marshall [pseudonym; Arthur Hammond Marshall], chapter I, in The Squire’s Daughter, London: Methuen & Co. […], →OCLC:
Wrex: I escaped with my life. But not before I sank my dagger deep into my father's chest. Wrex: That... is why I left. And that's why I'll never go back.2008, BioWare, Mass Effect (Science Fiction), Redwood City: Electronic Arts, →ISBN, →OCLC, PC, scene: Normandy SR-1:
Business, Commerce, Retail An item of merchandise that needs to be returned to a shelf or rack, for example because a customer has decided not to purchase it or has brought it back for an exchange.