irrational

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irrational[1,adjective] irrational[2,noun] irrational number

Main Entry: ¹ir·ra·tio·nal
Pronunciation: i-'ra-sh(&-)n&l, "i(r)-
Function: adjective
Etymology: Middle English, from Latin irrationalis, from in- + rationalis rational
: not rational: as a (1) : not endowed with reason or understanding (2) : lacking usual or normal mental clarity or coherence b : not governed by or according to reason <irrational fears> c Greek & Latin prosody (1) of a syllable : having a quantity other than that required by the meter (2) of a foot : containing such a syllable d (1) : being an irrational number <an irrational root of an equation> (2) : having a numerical value that is an irrational number <a length that is irrational>
- ir·ra·tio·nal·i·ty /-"ra-sh&-'na-l&-tE/ noun
- ir·ra·tio·nal·ly /-'ra-sh(&-)n&-lE/ adverb