1. Destitute of reason; as, a reasonless man or mind.
2. Void of reason; not warranted or supported by reason; unreasonable.
This proffer is absurd and reasonless. --Shak.
adj 1: not marked by the use of reason; "mindless violence";
"reasonless hostility"; "a senseless act" [syn: mindless,
2: not endowed with the capacity to reason; "a reasonless
3: having no justifying cause or reason; "a senseless,
causeless murder"; "a causeless war that never had an
aim"; "an apparently arbitrary and reasonless change"