adjective
hollower; -est
having nothing inside :not solid
curved inward or down
not having real value or meaning
A sound that is hollow is like the sound made when you hit something that is empty inside.
weak and without any emotion
noun
plural -lows
[count] a place or area (especially on the ground) that is lower than the area around it
an empty space inside of something
in the hollow of your hand
If you hold something in the hollow of your hand, you hold it in your palm with your hand curved like a cup
verb
-lows; -lowed; -lowing
[+ obj] :to remove the inside of (something)
hollow out
[phrasal verb]
hollow (something) out or hollow out (something)
to remove the inside of (something) :to make an empty space in (something)
to form (something) by digging or cutting the inside of something