Exposure to something dangerous means being in a situation where it might affect you.

Exposure is the harmful effect on your body caused by very cold weather.

The exposure of a well-known person is the revealing of the fact that they are bad or immoral in some way.

Exposure is publicity that a person, company, or product receives.

In photography, an exposure is a single photograph.

In photography, the exposure is the amount of light that is allowed to enter a camera when taking a photograph.