To restore to a former place, position, condition, etc.; to put back
When you've finished using the telephone, please replace the handset.
To refund; to repay; to pay back
You can take what you need from the petty cash, but you must replace it tomorrow morning.
To supply or substitute an equivalent for
I replaced my car with a newer model.
To take over the position or role from.
To take the place of; to be used instead of
This security pass replaces the one you were given earlier.
To demolish (a building) and build an updated form of that building in its place.
To place again.
To put in a new or different place.