English Dictionary

reason

IPA（発音記号）

/ˈɹiːzən/

名詞

可算名詞 不可算名詞 廃用

That which causes something: an efficient cause, a proximate cause. / A motive for an action or a determination.

日本語の意味

原因：ある事象を引き起こす根本的な要因 / 理由：行動や決定の背後にある動機や根拠

The reason for the bridge's collapse was the weakened central support that had been eroded for years.

橋の崩落の原因は、長年侵食されていた中央の支えの弱体化でした。

意味（1）

That which causes something: an efficient cause, a proximate cause.

The reason this tree fell is that it had rotted.

意味（2）

A motive for an action or a determination.

The reason I robbed the bank was that I needed the money.

意味（3）

An excuse: a thought or a consideration offered in support of a determination or an opinion; that which is offered or accepted as an explanation.

I have forgotten the reason he gave for not travelling by air. I felt sure that it was not the correct reason, and that he suffered from a heart trouble which he kept to himself.

意味（4）

(logic) A premise placed after its conclusion.

意味（5）

(uncountable) Rational thinking (or the capacity for it); the cognitive faculties, collectively, of conception, judgment, deduction and intuition.

Mankind should develop reason above all other virtues.

意味（6）

(obsolete) Something reasonable, in accordance with thought; justice.

I was promised, on a time, To have reason for my rhyme.

意味（7）

(mathematics, obsolete) Ratio; proportion.

{{RQ:Barrow Mathematical Learning|chapter=Lecture XVII. Of the Names and Diversities of the Twofold Kind of Reason or Proportion, viz. Arithmetical and Geometrical|pages=323–324|pageref=324|passage=[I]f two Quantities repreſented by the Numbers 20 and 4 be compared, by dividing the Antecedent 20 by the Conſequent 4, the Quotient is 5; but inverting the Terms, by dividing 4 by 20 the Quotient is tfrac 4 20= tfrac 1 5. By which Quotients are declared the Geometrical Reaſons of the propoſed Quantities, becauſe if the Quotient found be multiplied by the Conſequent, the Product is equal to the Antecedent; for in the former Compariſon 5⨯4=20, in the latter tfrac 1 5⨯20=4; as Things again are referred to Equality.}}

reasons （ plural ）