The widow was desolate because her husband died.
it means something bleak and desertedexamples: It was a lonely, desolate landscape, a few bare trees around, the wind tearing the few remaining leaves from their weak branches
Antarctica is a desolate continent.
This is the most desolate place I have ever been to.
Desolate is a synonym of the word barren. A sentence with the word desolate is A desert is a very desolate place