irrational

• Décrit des pensées, actions ou croyances qui ne sont pas fondées sur la raison ou la logique, ou qui contredisent le bon sens.

Describes thoughts, actions, or beliefs that are not based on reason or logic.

1. Not logical or reasonableB2formal

   Not based on reason, logic, or clear thinking; contrary to rational thought.

   irrationnel (au sens de contraire à la raison)

   • His fear of spiders is completely irrational.
   • She made an irrational decision without considering the consequences.
   • The argument was based on irrational assumptions.

   Synonymesabsurdfoolishillogicalmindlessnonsensicalsenselessunreasonableunthinkingunwise

   Antonymescogentcoherentlogicalrationalreasonablesensiblesound

2. MathematicsC1formalscientific

   A number that cannot be expressed as a simple fraction; not rational.

   Nombre irrationnel

   • The square root of 2 is an irrational number.
   • Pi is an irrational number with infinite non-repeating decimals.
   • Irrational numbers cannot be written as a ratio of two integers.

   Synonymesincommensurablenonrationalsurd

   Antonymesrational

• Nom désignant un nombre réel qui ne peut pas être exprimé comme le rapport de deux entiers, par exemple la racine carrée de 2 ou le nombre pi.

A noun referring to a real number that cannot be expressed as a ratio of two integers, such as the square root of 2 or pi.

1. Irrational numberC1formalscientific

   A real number that cannot be expressed as a ratio of two integers; its decimal representation is non-terminating and non-repeating.

   Nombre irrationnel

   • Pi (π) is an irrational number.
   • The square root of 2 is irrational.
   • Euler's number e is an example of an irrational number.

   Synonymesirrational numbersurd

   Antonymesrational