Definitions

1. noun

A cavity or hole, typically in a solid object.

“The hollow of the tree trunk provided shelter for the animals.”

2. adjective

Lacking substance or content; empty or vacant.

“The hollow words of the politician failed to convince the audience.”

3. verb

To remove the interior of something, especially to make it lighter or to create a space.

“The engineers hollowed out the rock to create a tunnel.”