I agree that every one of us has to decide our own definition of a UFO. I chose two projects each week to work on, which are my WIPs. Almost anything I am not working on this week is a UFO, even if I just worked on it last week Finished to me means quilted and bound.
Once I have a pattern and all the fabrics bagged up, if am not currently working on it, it is a UFO, even if I haven't made a single cut or stitch.
The only exceptions are if I have a quilt in mind, but do not yet have all the materials I need, and my L/E crumbs and 4Ps. As soon as I decide on a design for the L/Es, if it is one of this week's WIPs, it is a UFO.
With my machine in the shop this week, the only project I have that isn't a UFO is the DJ I am hand piecing.