1The flow or loss of blood from the body; bleeding, especially in a medical or injury context.
転んで手から出血したので、すぐに止血した。
I fell and my hand started bleeding, so I stopped it right away.
内部出血が疑われたため、緊急手術になった。
Internal bleeding was suspected, so emergency surgery was performed.
鼻血が頻繁に出るなら、一度医者に相談したほうがいい。
If you get nosebleeds often, you should consult a doctor once.
2Used figuratively for ongoing financial loss — a business or venture continually losing money is said to be 'bleeding'. Also used in phrases like '出血大サービス' for a deep, loss-making discount.
その事業は採算が合わず、毎月大きく出血している。
That business isn't profitable and is bleeding money every month.
在庫を一掃するため、出血覚悟で値下げした。
To clear out the inventory, we cut prices even though it meant taking a loss.