重大(じゅうだい)な

じゅうだいな
adjective
serious; grave; critical; significant
1. serious; grave; critical
Describing a situation, problem, or matter that is very serious and demands attention, often with potentially severe consequences.
重大(じゅうだい)な問題(もんだい)が発生(はっせい)した。
A serious problem has occurred.
重大(じゅうだい)な事故(じこ)が起(お)きないよう対策(たいさく)を取(と)った。
Measures were taken to prevent a serious accident from occurring.
この不具合(ふぐあい)は放置(ほうち)すると重大(じゅうだい)な結果(けっか)を招(まね)くおそれがある。
If left unaddressed, this defect could lead to serious consequences.
2. significant; important; major
Describing something of great importance or impact, such as a decision, announcement, or discovery.
重大(じゅうだい)な発表(はっぴょう)がある。
There is an important announcement.
これは歴史的(れきしてき)に重大(じゅうだい)な意味(いみ)を持(も)つ。
This holds historically significant meaning.
首相(しゅしょう)は重大(じゅうだい)な決断(けつだん)を迫(せま)られていた。
The prime minister was being pressed to make a critical decision.

A formal na-adjective that conveys weight and urgency. Frequently used in news, official statements, and formal writing. The two senses are closely related — something 重大(じゅうだい) is both important and potentially dangerous.

COMMON COLLOCATIONS:

  • 重大(じゅうだい)な問題(もんだい): serious problem
  • 重大(じゅうだい)な事故(じこ): serious accident
  • 重大(じゅうだい)な決断(けつだん): critical decision
  • 重大(じゅうだい)な過失(かしつ): serious negligence
  • 重大(じゅうだい)な影響(えいきょう): significant impact
  • 重大(じゅうだい)な発表(はっぴょう): major announcement

SIMILAR WORDS:

  • 深刻(しんこく)な: serious; grave — emphasizes that the situation is dire and worsening
  • 重要(じゅうよう)な: important — neutral in tone; does not carry the ominous weight of 重大(じゅうだい)
  • 大変(たいへん)な: serious; terrible — more conversational and emotional
general
Added 2026.4.26 0:13
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