'Unreason' definitions:

Definition of 'unreason'

From: WordNet
noun
The state of being irrational; lacking powers of understanding [syn: irrationality, unreason]

Definition of 'Unreason'

From: GCIDE

Definition of 'Unreason'

From: GCIDE
  • Unreason \Un*rea"son\, v. t. [1st pref. un- + reason.] To undo, disprove, or refute by reasoning. [Obs.] [1913 Webster]
  • To unreason the equity of God's proceedings. --South. [1913 Webster]