A hole or hollow depression in a solid object. / (anatomy) A hollow area within the body.

plural of cavity

(pathology) inflammation of the vena cava

Having cavities.

(construction) A double wall of masonry connected by an air space.

The cavity within the body of animals which contains the viscera.

(anatomy) The cavity of the mouth, especially the part of the mouth behind the gums and teeth that is bounded above by the hard and soft palates and below by the tongue and by the mucous membrane connecting it with the inner part of the mandible.

(anatomy) In higher vertebrates, a large air-filled space above and behind the nose in the middle of the face.

(anatomy) The hollow portion of the torso within the abdomen, containing the abdominal organs, in mammals below the diaphragm.

(anatomy) The thoracic-abdominal cavity, containing the heart, etc.