What's the difference between
and
Enter two words to compare and contrast their definitions, origins, and synonyms to better understand how those words are related.

Giddy vs Irrational - What's the difference?

giddy | irrational | Synonyms |

Giddy is a synonym of irrational.


As adjectives the difference between giddy and irrational

is that giddy is dizzy, feeling dizzy or unsteady and as if about to fall down while irrational is not rational; unfounded or nonsensical.

As a verb giddy

is (obsolete|transitive) to make dizzy or unsteady.

As a noun irrational is

a real number that can not be expressed as the quotient of two integers, an irrational number.

giddy

English

Adjective

(er)
  • Dizzy, feeling dizzy or unsteady and as if about to fall down.
    • The man became giddy upon standing up so fast.
  • Causing dizziness: causing dizziness or a feeling of unsteadiness.
    • They climbed to a giddy height.
  • Lightheartedly silly, or joyfully elated.
  • * {{quote-book, year=1905, author=
    • , title= , chapter=2 citation , passage=Miss Phyllis Morgan, as the hapless heroine dressed in the shabbiest of clothes, appears in the midst of a gay and giddy throng; she apostrophises all and sundry there, including the villain, and has a magnificent scene which always brings down the house, and nightly adds to her histrionic laurels.}}
    The boy was giddy when he opened his birthday presents.
  • (archaic) Frivolous, impulsive, inconsistent, changeable.
  • * 1599 ,
    • In brief, since I do purpose to marry, I will think nothing to any purpose that the world can say against it; and therefore never flout at me for what I have said against it, for man is a giddy thing, and this is my conclusion.
  • * 1784 , , Tirocinium; or, A Review of Schools
    • Young heads are giddy and young hearts are warm,
    And make mistakes for manhood to reform.

    Synonyms

    * dizzy

    Derived terms

    * giddiness

    See also

    * vertiginous

    Verb

  • (obsolete) To make dizzy or unsteady.
  • To reel; to whirl.
    • (Chapman)

    irrational

    English

    Adjective

    (en adjective)
  • Not rational; unfounded or nonsensical.
    • an irrational decision
  • * July 18 2012 , Scott Tobias, AV Club The Dark Knight Rises [http://www.avclub.com/articles/the-dark-knight-rises-review-batman,82624/]
    • 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.
  • (mathematics, arithmetic, number theory, not comparable) Of a real number, that cannot be written as the ratio of two integers.
    • The number π is irrational .

    Antonyms

    * (mathematics) rational

    Hyponyms

    * (mathematics) transcendental

    Derived terms

    * irrational number * irrationality * irrationalize * irrationalization

    Noun

    (en noun)
  • 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.