Curved or bowed outward like the outside of a bowl, circle, or sphere.
arranged such that for any two points in the set, a straight line between the two points is contained within the set.
having no internal angles greater than 180 degrees.
having an epigraph that is a convex set.
A playing card made convex for use in cheating.
A small convex mirror used to cheat by observing other players' cards.
Any convex body or surface.
Pertaining to hollow body position
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.
Having an empty space or cavity inside.
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.
To call or urge by shouting; to hollo.
to make a hole in something; to excavate
Completely, as part of the phrase beat hollow or beat all hollow.