viewer

One that views, especially an onlooker or spectator.

Any of various optical devices used to facilitate the viewing of photographic transparencies by illuminating or magnifying them.

A person who watches television or movies.

One who views, surveys, or examines.

Specifically— An official appointed to inspect or superintend something; an overseer; in coal-mining, the general manager, both above and below ground, of a coal-mine. This word, not at all in use in the United States, is almost obsolete in England, having become replaced by the terms mining-engineer and agent. The terms used in the United States are manager and superintendent.

One of a body of jurors who are appointed by a court to view or inspect the property in controversy or the place where a crime has been committed. In Scotland two persons called showers point out the subjects to be viewed.

One who views or examines.

A person appointed to inspect highways, fences, or the like, and to report upon the same.

The superintendent of a coal mine.

Someone that views some spectacle; an onlooker or spectator