(anatomy) a natural hollow or sinus within the body | an area in which something acts or operates or has power or control: |
a sizeable hole (usually in the ground) | the bony cavity in the skull containing the eyeball |
soft decayed area in a tooth; progressive decay can lead to the death of a tooth | the (usually elliptical) path described by one celestial body in its revolution about another |
space that is surrounded by something | the path of an electron around the nucleus of an atom |
| a particular environment or walk of life |