rational

rationnel, raisonnable

Qui repose sur une réflexion attentive et de bonnes raisons.

En anglais simple : Based on careful thought and good reasons.

• That seems like a rational choice.
• We need a rational explanation for these changes.
• Her decision was rational and supported by evidence.

Synonymes : reasonable, logical, sensible

Contraires : irrational

Expressions courantes : rational decision, rational explanation, rational choice, rational argument

raisonnable, posé

Capable de réfléchir clairement et calmement sans se laisser dominer par des émotions fortes.

En anglais simple : Able to think clearly and calmly without letting strong feelings control you.

• Try to stay rational.
• She remained rational despite the angry comments.
• Can we have a rational discussion about this?

Synonymes : level-headed, calm, reasonable

Contraires : irrational, emotional

Expressions courantes : remain rational, rational person, stay rational

sensé, raisonnable

Capable de penser de façon sensée et de comprendre ce qui se passe.

En anglais simple : Able to think sensibly and understand what is happening.

• He still has a rational mind.
• Her conduct was rational throughout the difficult week.
• The doctor checked whether he was rational and alert.

Synonymes : sane, reasonable, sensible

Contraires : irrational

Expressions courantes : rational mind, rational behavior, rational conduct

nombre rationnel

Nombre qui peut s’écrire comme un entier divisé par un autre entier non nul.

En anglais simple : A number that can be written as one whole number divided by another.

• One half is a rational.
• Adding two rationals gives another rational.
• Can this number be expressed as a rational?

Synonymes : rational number

Expressions courantes : positive rational, nonzero rational, every rational