Any adjective that is not gradable.
That cannot be graded.
(of an adjective) Describing a quality that cannot normally be varied because it is extreme (e.g. freezing), absolute (e.g. dead), or classification (e.g. nuclear).
A person or thing that is outstandingly bad.
Another unspecified item, perhaps not yet known or decided upon.
Something exceptional, out of the ordinary, unusual.