1. non-gradable - Noun
2. non-gradable - Adjective
That cannot be graded.
(linguistics) (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).
Synonyms: ungradable, uncomparable, incomparable
Antonym: gradable
non-gradable (plural non-gradables)
(linguistics) Any adjective that is not gradable.