Hollow

Having an empty space or cavity, natural or artificial, within a solid substance; not solid; excavated in the interior; as, a hollow tree; a hollow sphere.

Depressed; concave; gaunt; sunken.

Reverberated from a cavity, or resembling such a sound; deep; muffled; as, a hollow roar.

Not sincere or faithful; false; deceitful; not sound; as, a hollow heart; a hollow friend.

A cavity, natural or artificial; an unfilled space within anything; a hole, a cavern; an excavation; as the hollow of the hand or of a tree.

A low spot surrounded by elevations; a depressed part of a surface; a concavity; a channel.

To make hollow, as by digging, cutting, or engraving; to excavate.

Wholly; completely; utterly; -- chiefly after the verb to beat, and often with all; as, this story beats the other all hollow. See All, adv.

Hollo.

To shout; to hollo.

To urge or call by shouting.

a depression hollowed out of solid matter

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