Meaning of EXPOSURE in English

■ noun

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.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.