English

Noun

valley of death

1. (idiomatic) Death; or a place or period where death is impending.
   • Lord Alfred Tennyson, The Charge of the Light Brigade:

     Into the valley of Death / Rode the six hundred.

2. (idiomatic) A place of great danger.
3. (idiomatic, business) The phase of a startup business beginning with the entrepreneur's fulltime commitment to it and ending when the business has achieved sustainable cash flow.