Source : Webster's Revised Unabridged Dictionary (1913)

Categorically \Cat`e*gor"ic*al*ly\, adv.
   Absolutely; directly; expressly; positively; as, to affirm
   categorically.

Source : WordNet®

categorically
     adv : in an unqualified manner; "he flatly denied the charges"
           [syn: {flatly}, {unconditionally}]