What is "reduplicating"

Usage examples of "reduplicating".

Sometimes personal messages were forwarded in multiple copies, by regular interstellar couriers, the service sometimes duplicating and reduplicating the message without reading it, and sending copies on to different places, as often happened when the exact location of the addressee was unknown.

Where the highway begins to dominate the landscape, beyond the limits of a large and reduplicating city, near a major point of arrival and departure: this is most likely where it stands.