Dictionary definition · hollow
noun
- a cavity or space in something"hunger had caused the hollows in their cheeks"
- a small valley between mountains"he built himself a cabin in a hollow high up in the Appalachians"
- a depression hollowed out of solid matter
verb
- remove the inner part or the core of"the mining company wants to excavate the hillside"
- remove the interior of"hollow out a tree trunk"
adjective
- not solid; having a space or gap or cavity"a hollow wall"
- as if echoing in a hollow space"the hollow sound of footsteps in the empty ballroom"
- devoid of significance or force"empty promises"
- lacking in substance or character"a hollow person"
Source: Open English WordNet (CC BY 4.0).