re‧place S2 W1 [transitive]
to start doing something instead of another person, or start being used instead of another thing:
I'm replacing Sue on the team.
Lectures have replaced the old tutorial system.
to remove someone from their job or something from its place, and put a new person or thing there:
Two of the tyres had to be replaced.
replace something with something
They replaced the permanent staff with part-timers.
if you replace something that has been broken, stolen etc, you get a new one [↪ irreplaceable]:
I'll replace the vase I broke as soon as possible.
to put something back where it was before:
He replaced the book on the shelf.