irrational
adjective
[ ɪˈraʃ(ə)n(ə)l ]
• not logical or reasonable.
• "irrational feelings of hostility"
Similar:
unreasonable,
illogical,
groundless,
baseless,
unfounded,
unjustifiable,
unsound,
absurd,
ridiculous,
ludicrous,
silly,
foolish,
senseless,
nonsensical,
laughable,
idiotic,
stupid,
wild,
untenable,
implausible,
unscientific,
arbitrary,
crazy,
mad,
barmy,
daft,
backasswards,
• (of a number, quantity, or expression) not expressible as a ratio of two integers, and having an infinite and non-recurring expansion when expressed as a decimal. Examples of irrational numbers are the number π and the square root of 2.
irrational
noun
• an irrational number or quantity; a surd.
Origin:
late Middle English: from Latin irrationalis, from in- ‘not’ + rationalis (see rational).
