Noun
1. a cavity or space in something;
"hunger had caused the hollows in their cheeks"2. a small valley between mountains;
"he built himself a cabin in a hollow high up in the Appalachians"3. a depression hollowed out of solid matter
Verb
1. remove the inner part or the core of;
"the mining company wants to excavate the hillsite"2. remove the interior of;
"hollow out a tree trunk"Adjective
1. not solid; having a space or gap or cavity;
"a hollow wall""a hollow tree""hollow cheeks""his face became gaunter and more hollow with each year"2. deliberately deceptive;
"hollow (or false) promises""false pretenses"3. as if echoing in a hollow space;
"the hollow sound of footsteps in the empty ballroom"4. devoid of significance or point;
"empty promises""a hollow victory""vacuous comments"