Определение valley of the shadow of death в Английский Язык Английский Язык словарь
A symbolic description of the world, meaning darkness and death are (symbolic) valleys on earth one must walk through, that is, part of the human experience
Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me... - Psalm 23.