A very thin fissure.
A fishing line made from hair.
The line along one's forehead where hair starts growing.
A very thin line in writing, drawing, or typography.
very thin, as thin as a hair
A sunken area.
A sunken area or unfilled space in something solid; a cavity, natural or artificial.
A small valley between mountains.
A feeling of emptiness.
Concave; gaunt; sunken.
Insincere, devoid of validity; specious.
Distant, eerie; echoing, reverberating, as if in a hollow space; dull, muffled; often low-pitched.
Without substance; having no real or significant worth; meaningless.
Pertaining to hollow body position
Having an empty space or cavity inside.
Completely, as part of the phrase beat hollow or beat all hollow.
To call or urge by shouting; to hollo.
to make a hole in something; to excavate