‘劫后余生’ literally means ‘remaining life after a calamity’ — ‘劫’ (jié) refers to a sudden disaster or catastrophe (like war, earthquake, or serious illness); ‘后’ (hòu) means ‘after’; ‘余’ (yú) means ‘remaining’ or ‘leftover’; and ‘生’ (shēng) means ‘life’ or ‘existence’. Together, the phrase describes the state of having narrowly survived a life-threatening crisis. It carries strong emotional weight — gratitude, relief, fragility, and sometimes trauma — and is often used in reflective, literary, or solemn contexts.

This term is not used for minor setbacks (e.g., missing a bus), but for events that genuinely threaten survival: major accidents, natural disasters, critical illness, or wartime danger. It emphasizes both the gravity of what was endured and the preciousness of continued life. While grammatically a noun, it frequently functions as a subject or predicate noun in sentences expressing profound personal transformation or gratitude.