Irrationality Definition of Irrationality at Dictionary noun, plural irrationalities for the quality or condition of being irrational an irrational, illogical, or absurd action, thought, etc. Irrationality definition of irrationality by The Free Though one may be beside one self with feelings ranging from pleasure to rage, the essence of the state is irrationality being out of one s wits The phrase is akin to the French hors de soi, and both relate to the concepts of being possessed or transported. Irrationality Synonyms, Irrationality Antonyms Thesaurus The irrationality of the defence was a final proof that the lawyer had played him false In one of the notes Legendre gives a proof of the irrationality of The irrationality of this world is equaled by its weakness and its licentiousness This property is referred to as the irrationality of dispersion. Irrationality an overview ScienceDirect Topics Nonrational theories are not theories of irrationality Rather, they dispense with unrealistic assumptions, like omniscience and optimization, in so called rational theories The goal of nonrational theories is to account for how actual humans and animals make decisions with limited time, knowledge, assets, and other scarce resources. Irrational Definition of Irrational by Merriam Webster irrational adjective not rational such as not endowed with reason or understanding lacking usual or normal mental clarity or coherence not governed by or according to reason having a quantity other than that required by the meter containing such a syllable being an irrational number having a numerical value that is an irrational number.