/ rɪˈpleɪs; NAmE / verb [ vn ]
1.
to be used instead of sth/sb else; to do sth instead of sb/sth else
SYN take over from :
The new design will eventually replace all existing models.
Teachers will never be replaced by computers in the classroom.
2.
replace sb/sth (with / by sb/sth) to remove sb/sth and put another person or thing in their place :
He will be difficult to replace when he leaves.
It is not a good idea to miss meals and replace them with snacks.
3.
to change sth that is old, damaged, etc. for a similar thing that is newer or better :
All the old carpets need replacing.
You'll be expected to replace any broken glasses.
4.
to put sth back in the place where it was before :
I replaced the cup carefully in the saucer.
to replace the handset (= after using the telephone) .