The importance or seriousness of something; the degree to which something is significant or grave.
事件の重大性を考慮して、警察は慎重に捜査を進めた。
Considering the seriousness of the incident, the police proceeded with the investigation carefully.
この報告書は気候変動問題の重大性を明確に示している。
This report clearly shows the importance of the climate change issue.
彼は問題の重大性に気づいておらず、対応が遅れた。
He didn't realize the seriousness of the problem, and his response was delayed.
環境への影響の重大性を強調して、会議で説明した。
I emphasized the seriousness of the environmental impact and explained it at the meeting.