If we had a definition of perfection, it would be on a sliding scale, total corruption on one side of the scale, and total perfection on the other and as so far there has been no actualisation of perfection, and "perfection" has the status of a concept.
The problem is imagining the nature of a perfect being as Craven de Kere has said perfection is seen subjectively to describe different things, when one says something is done perfectly this usually means to the best of your ability since we do not have any real knowledge of perfection because it has not been actualised - in theory there can be being who can create something better in every attribute than objects that humans create.
I have no idea what perfection is though