Read the dictionary definition of hollow. All definitions for this word.
1. a depression hollowed out of solid matter
2. a small valley between mountains
1. he built himself a cabin in a hollow high up in the Appalachians
3. a cavity or space in something
1. hunger had caused the hollows in their cheeks
4. remove the interior of
1. hollow out a tree trunk
5. remove the inner part or the core of
1. the mining company wants to excavate the hillside
6. lacking in substance or character
1. a hollow person
7. devoid of significance or force
1. empty promises
2. a hollow victory
3. vacuous comments
8. as if echoing in a hollow space
1. the hollow sound of footsteps in the empty ballroom
9. not solid; having a space or gap or cavity
1. a hollow wall
2. a hollow tree
3. hollow cheeks
4. his face became gaunter and more hollow with each year