hollow

Sense 1 noun

a cavity or space in something

hunger had caused the hollows in their cheeks

Sense 2 verb

remove the inner part or the core of

the mining company wants to excavate the hillside

Sense 3 adjective

not solid; having a space or gap or cavity

a hollow wall

Sense 4 noun

a small valley between mountains

he built himself a cabin in a hollow high up in the Appalachians

Sense 5 verb

remove the interior of

hollow out a tree trunk

Sense 6 adjective

as if echoing in a hollow space

the hollow sound of footsteps in the empty ballroom

Sense 7 noun

a depression hollowed out of solid matter

Sense 8 adjective

devoid of significance or point

empty promises