1》 the state of being exposed to harm or risk.
↘a physical condition resulting from being exposed to severe weather conditions.
2》 the revelation of something secret.
↘the publicizing of information or an event.
3》 the action of exposing a photographic film.
↘the quantity of light reaching a photographic film, as determined by shutter speed and lens aperture.
4》 the direction in which a building faces.