The only people redifining what "theory" means in science, are creationists and cdesign proponentsists. Take Michael Behe for example on the Dover trial... One of the ID heroes, being an actual PhD guy. He redefined "scientific theory" in such a way that he could call ID to be such a "theory". The punchline being that under that new definition - astrology ALSO qualifies as a "scientific theory". You know, astrology.... horoscopes and such.
Go figure.
Evolution theory on the other hand, doesn't require any redefining of the word "theory" in scientific context.
Evolution and abiogenesis are two different subject. They're even seperate scientific fields.
Evolution theory doesn't address the origins of life itself.
Even if you wish to say that God seeded life on this planet, evolution is perfectly compatible with that (as long as the claim isn't that he created evolved creatures from scratch, which off course is not compatible with the facts of genetics).