Un-rēa′son1, n.
(-rē′zn), n. Want of reason; unreasonableness; absurdity; nonsense. Abbot of Unreason, a mock abbot in the old English Christmas festivities. W. Scott.
2 entries under this word
Unreason
Un-rēa'son2, v. t.
To prove or cause to appear unreasonable, or not according to reason; to disprove or refute. [Obs. and rare.] “To unreason the equity of God’s proceedings.” South.