[Baron Munchausen]

It basically means 'retro-tech' science fiction, backformed from Cyberpunk.

http://en.wikipedia.org/wiki/Steampunk

Steampunk is a subgenre of speculative fiction, usually set in an anachronistic Victorian or quasi-Victorian alternate history setting. Fiction in the steampunk genre is set in the past, or a world resembling the past, in which modern technological developments occurred earlier in history, but were accomplished via the technology already present in that time period. The genre typically falls into the realm of science fiction.