A hollow area within the body.
A hole or hollow depression in a solid object.
A small or large hole in a tooth caused by caries; often also a soft area adjacent to the hole also affected by caries.
An unoccupied space where something may be stored
Vacuum; a space containing nothing at all
A feeling of longing for someone or something that is gone; a sense of a thing's absence.
An unoccupied area or volume.