|4.||(of clocks and watches) to be set to an earlier time, as during British Summer Time: when do the clocks go back this year?|
Return, retrace one's steps; also, return to a former condition. For example, I'm going back to the haunts of my youth, or We want to go back to the old way of doing things. [First half of 1500s]
Extend backward in space or time, as in Our land goes back to the stone wall, or The family name goes back to Norman times. [Second half of 1600s] Also see go back on.