Akademik

1. adjective /ˈhɒl.əʊ,ˈhɑ.loʊ/

a) (of something solid) Having an empty space or cavity inside.

b) (of a sound) Distant, eerie; echoing, reverberating, as if in a hollow space; dull, muffled; often low-pitched.

2. noun /ˈhɒl.əʊ,ˈhɑ.loʊ/

a) A small valley between mountains; "he built himself a cabin in a hollow high up in the Rockies"

b) A sunken area in something solid.

3. verb /ˈhɒl.əʊ,ˈhɑ.loʊ/

to make a hole in something; to excavate