1. 1〔法則〕
    • 自然の理
    • the law [rules] of nature
  1. 2〔理屈〕reason
    • 人に理を説く
    • reason with a person
    • 理にかなった[かなわない]要求
    • 「a reasonable [an unreasonable] demand
    • 理にかなった事は何でもします
    • I will do anything within reason.
    • 彼はいつも理にかなった事を言う
    • He always speaks reason.
    • そのような提案は理にかなわない
    • Such a proposal isn't sensible.
    • 理が非でもやれとの会社の命令だった
    • It was a company order that had to be carried out no matter what the cost.
    • 彼の演説は理に落ちるのが欠点だ
    • The trouble with his speeches is that they tend to be argumentative [polemical].
    • 親が子を愛するのは理の当然である
    • It is only natural that parents should love their children.