Categorical means without qualification or exception.
Categorical is a adjective.
Synonyms: clear, absolute, precise, emphatic, exact, explicit, unambiguous, unequivocal, unqualified.
Antonyms: ambiguous, conditional, doubtful, unclear, vague, indefinite, equivocal.
The traffic police made a categorical denial of the charge that he had taken bribes.
Mr.Ravi categorically refuses to have anything to do with my family.