set back verb5 •To remove from or allow distance.Set it back from the road by twenty or thirty feet. •To delay or obstruct.I expect it will set us back by a day or so, but I think a side trip will be worthwhile.Having the mindset that you "can't" reach your goals is only going to set you back. •To cost money.How much do you suppose that fancy dress set her back? •To install or position behind a boundary or surface, or in a recess.The statue was set back in a niche. •To reverse, go backwards.Before the platforms were extended up to the actual junction, branch trains had to set back into a bay. — 1939 formssetting back · sets back