Definition from Wiktionary, the free dictionary
Ultimately from Latin dēsōlātiō.
desolation (plural desolations)
- The act of desolating or laying waste; destruction of inhabitants; depopulation.
- The state of being desolated or laid waste; ruin; solitariness; destitution; gloominess.
- A place or country wasted and forsaken.
Middle French 
desolation f (plural desolations)