大だいニュースだいニュースMeanings1nounbig news; major newsRefers to important, surprising, or widely reported news. Often used in headlines or casual conversation.今日きょうの大だいニュースは何なんですか。What's the big news today?彼かの女じょの結けっ婚こんは会かい社しゃの大だいニュースになった。Her marriage became big news at the company.