noun
dying; laying down one's life
Formal or literary term for death, often implying a noble or sacrificial death. Not used in casual conversation.
彼は国のために一死を遂げた。
He died for his country.
noun
Baseball term for one out in an inning.
一死満塁のチャンスで、バッターは三振した。
With one out and the bases loaded, the batter struck out.