to make someone start talking about a particular subject again
This talk of holidays brings me back to my original question, which was what are we doing this summer?
phrasebring back to bring sb back to earth/reality to force someone to think about the real situation they are in, after a period when they were happily ignoring it: Emily was still daydreaming about Italy and Guiseppe, when a sharp knock at the door brought her back to reality.I'd been enjoying planning our holiday until Beryl brought me back to earth by reminding me of our debts.