A small valley between mountains.
He built himself a cabin in a hollow high up in the Rockies.
A sunken area or unfilled space in something solid; a cavity, natural or artificial.
the hollow of the hand or of a tree
A sunken area.
A feeling of emptiness.
a hollow in the pit of one's stomach
To make a hole in something; to excavate
To call or urge by shouting; to hollo.