1. Containing an empty space, natural or artificial, within a solid substance; not solid; as a hollow tree; a hollow rock; a hollow sphere.

Hollow with boards shalt thou make it. Exo 27.

2. Sunk deep in the orbit; as a hollow eye.

3. Deep; low; resembling sound reverberated from a cavity, or designating such a sound; as a hollow roar.

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

Hollow spar, the mineral called also chiastolite.

, v.i. To shout.