Definitions:

1. a cavity or space in something noun
   • hunger had caused the hollows in their cheeks
2. a small valley between mountains noun
   • I built myself a cabin in a hollow high up in the Appalachians.
3. as if echoing in a hollow space adjective
   • the hollow sound of footsteps in the empty ballroom
4. remove the interior of verb
   • hollow out a tree trunk

Synonyms:

• core out
• dig
• hole
• holler
• hollow out
• vacuous

NearBy Words:

• hollow-back
• hollow-eyed
• hollow-horned
• holloware
• hollowness
• hollowware