adj \(ˈ)ir-ˈ(r)ash-nəl, -ən-əl\

Definition of IRRATIONAL

: not rational: as a : lacking usual or normal mental clarity or coherence <was irrational for several days after the accident> b : not governed by or according to reason <irrational fears>
ir·ra·tio·nal·i·ty \(ˌ)ir-ˌ(r)ash-ə-ˈnal-ət-ē\ noun, plural ir·ra·tio·nal·i·ties
ir·ra·tio·nal·ly \(ˈ)ir-ˈ(r)ash-nə-lē, -ən-əl-ē\ adverb

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