Probably a rejection or maybe waitlist. If you got accepted you would have gotten a phone call and the AADSAS status would have changed to offer made. My friend got rejected after pre Dec 1 interview and AADSAS is still blank.
I got a rejection letter from OU and called them. They said, "oh we sent those to all the non-residents who didn't interview this year, disregard it."
It turns out my residency status was in the wrong category, so I just showed up with my mortgage closing documents from four years ago (buying primary property in-State) with a big, fat signature on everything and they let it go.