expression, ichidan verb
to be out of danger; to cross the line between life and death
Idiomatic expression meaning to survive a life-threatening situation or crisis. Often used when someone has passed the worst point of an illness or dangerous event.
See also: 峠を越す
大手術の後、彼はようやく死線を越えた。
After major surgery, he finally crossed the line between life and death and was out of danger.
集中治療室で一晩過ごしたが、朝には死線を越えたと医者が言った。
He spent the night in the ICU, but in the morning the doctor said he had passed the critical point.