This meaning refers to a physical or metaphorical absence of something, indicating an area that is unoccupied or lacking content.

This usage refers to an opportunity or a spot that is available for use, such as a seat in a theater or a room in a hotel.

This meaning indicates leisure time when one is not occupied with work or other obligations, suggesting an opportunity for relaxation or activities.

This refers to items or spaces that are not being utilized, often suggesting neglect or obsolescence.