正当性(せいとうせい)

せいとうせい
noun
legitimacy; justification; validity
formal
1. legitimacy; rightfulness; justification
The quality of being morally right, logically justified, or socially acceptable. Often used when questioning or asserting whether an action, decision, or claim is properly grounded.
正当性(せいとうせい)を主張(しゅちょう)する。
To assert legitimacy.
その決定(けってい)の正当性(せいとうせい)が問(と)われている。
The legitimacy of that decision is being questioned.
自分(じぶん)の行動(こうどう)に正当性(せいとうせい)があると信(しん)じているからこそ、強(つよ)く主張(しゅちょう)できる。
It is precisely because you believe your actions are justified that you can argue your case confidently.

Formed from 正当(せいとう) (legitimate, justified) + 性(せい) (-ness). Used in formal and academic discourse to discuss whether actions or claims are morally or logically sound.

Common collocations

Similar words

  • 妥当性(だとうせい): validity, reasonableness (whether something is sensible/appropriate)
  • 合法性(ごうほうせい): legality (whether something is permitted by law)
  • 正統性(せいとうせい): legitimate succession (same pronunciation; refers to rightful authority by lineage or tradition)

Related Words

Compare: 妥当性(だとうせい) (validity, reasonableness)
general
Added 2026.6.9 15:01 · Revised 2026.9.2 13:02
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