to make a hole in something; to excavate
To call or urge by shouting; to hollo.
A sunken area or unfilled space in something solid; a cavity, natural or artificial.
A sunken area.
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 riddle something with holes, especially in such a pattern.
A space-filling packing of polytopes in 3- or higher-dimensional space.
Any structure resembling a honeycomb.
A structure of hexagonal cells made by bees primarily of wax, to hold their larvae and for storing the honey to feed the larvae and to feed themselves during winter.
Voids left in concrete resulting from failure of the mortar to effectively fill the spaces among coarse aggregate particles.
Manufactured material used to manufacture light, stiff structural components using a sandwich design.
The texture of the surface of a solar cell, intended to increase its surface area and capture more sunlight.