different between irrational vs moonstruck

English

Etymology

From Latin irrati?n?lis, from ir- + rati?n?lis.

Pronunciation

• enPR: ?r?'sh(?)n?l, IPA^(key): /???æ?.(?.)n?l/

Adjective

irrational (comparative more irrational, superlative most irrational)

1. Not rational; unfounded or nonsensical.
   • July 18, 2012, Scott Tobias, AV Club The Dark Knight Rises[1]

     Where the Joker preys on our fears of random, irrational acts of terror, Bane has an all-consuming, dictatorial agenda that’s more stable and permanent, a New World Order that’s been planned out with the precision of a military coup.

2. (mathematics, arithmetic, number theory, not comparable) Of a real number, that cannot be written as the ratio of two integers.

   Antonym: rational

   Hyponym: transcendental

Derived terms

Translations

Noun

irrational (plural irrationals)

1. A real number that can not be expressed as the quotient of two integers, an irrational number.
   • 1946, Bertrand Russell, History of Western Philosophy, I.24:

     The square root of 2, which was the first irrational to be discovered, was known to the early Pythagoreans, and ingenious methods of approximating to its value were discovered.

Translations

German

Alternative forms

• irrationell

Pronunciation

• IPA^(key): /???at?si?ona?l/, /??at?si?o?na?l/

Adjective

irrational (comparative irrationaler, superlative am irrationalsten)

1. irrational

Declension

English

Etymology

moon +? struck. Compare German Low German maansüchtig, German mondsüchtig.

Adjective

moonstruck (comparative more moonstruck, superlative most moonstruck)

1. (obsolete) Crazy or insane when affected by the phases of the Moon.
2. (by extension) Showing irrational behaviour, especially of a romantic or sentimental nature.
   • 1902, William James, The Varieties of Religious Experience, Lectures 4 & 5:

     [W]e can also overlook the verbiage of a good deal of the mind-cure literature, some of which is so moonstruck with optimism and so vaguely expressed that an academically trained intellect finds it almost impossible to read it at all.

   • 1925, Sinclair Lewis, Arrowsmith, Chapter 21, IV:

     The full moon was spacious now behind the maples. The seedy Pickerbaugh domain was enchanted […] and over all the world was the proper witchery of moonstruck love.

3. (obsolete) Made sick, or (like fishes) unsuitable for food, by the supposed influence of the Moon.

Synonyms

• moonstricken

Translations