back
1.
to return sth to its usual place or to the place where it was before it was moved :
If you use something, put it back!
2.
to move sth to a later time or date
SYN postpone :
The meeting has been put back to next week.
3.
to cause sth to be delayed :
Poor trading figures put back our plans for expansion.
4.
to move the hands of a clock so that they show the correct earlier time :
Remember to put your clocks back tonight (= because the time has officially changed) .