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a conclusion; principle; efficient cause; final cause; ground of argument. I'll give him reasons for it. Shak. The reason of the motion of the balance in a wheel watch is by the motion of the next wheel. Sir M. Hale. This reason did the ancient fathers render, why the church was called "catholic." Bp. Pearson. Virtue…

Having the faculty of reason; endued with reason; rational; as, a reasonable being.

Quality of being reasonable.

In a reasonable manner.

One who reasons or argues; as, a fair reasoner; a close reasoner; a logical reasoner.

The act or process of adducing a reason or reasons; manner of presenting one's reasons.

A rationalist. [Obs.] Such persons are now commonly called "reasonists" and "rationalists," to distinguish them from true reasoners and rational inquirers. Waterland.

Destitute of reason; as, a reasonless man or mind. Shak.

To excel or surpass in reasoning; to reason better than. South.

or of betraying the state into the hands of a foreign power; disloyalty; treachery. The treason of the murthering in the bed. Chaucer.

Pertaining to treason; consisting of treason; involving the crime of treason, or partaking of its guilt. Most men's heads had been intoxicated with imaginations of plots and treasonable practices. Clarendon.

Treasonable. Shak. The treasonous book of the Court of King James. Pepys.

Want of reason; unreasonableness; absurdity. Abbot of Unreason. See Abbot of Misrule, under Abbot.

Not reasonable; irrational; immoderate; exorbitant. -- Un*rea"son*a*ble*ness, n. -- Un*rea"son*a*bly, adv.

Not supported by reason; unreasonable. "Unreasoned habits." Burke.

With stronger reason.

Characterizing that kind of reasoning which derives propositions from the observation of facts, or by generalizations from facts arrives at principles and definitions, or infers causes from effects. This is the reverse of a priori reasoning.

Characterizing that kind of reasoning which deduces consequences from definitions formed, or principles assumed, or which infers effects from causes previously known; deductive or deductively. The reverse of a posteriori.

mediæval times, the master of revels, as at Christmas; in Scotland called the Abbot of Unreason. Encyc. Brit.

A partial alienation of reason. "Occasional aberrations of intellect." Lingard. Whims, which at first are the aberrations of a single brain, pass with heat into epidemic form. I. Taylor.