One that takes the place of another
A person or persons taking over the duties of another
I haven't found any new replacement letters, but I've eliminated a lot of possibilities.
Actually, I've had to have some replacement parts specially made.
The replacement of the four direct taxes by the income tax in France, as proposed in 1909, is a very recent example.
Her replacement cell phone rang, jarring her.
in replacement of the Bulgarian 7th Div.