What Does It Mean?
You are correct!
From our dictionary:
cor•niche
(kôr'nish, kôr•nEsh'),
—n.
a winding road cut into the side of a steep hill or along the face of a coastal cliff.
(kôr'nish, kôr•nEsh'),
—n.
a winding road cut into the side of a steep hill or along the face of a coastal cliff.