a person who watches television, often a devotee of television or of a particular kind of television program: a weekly show aimed at teenage viewers.
3.
any of various optical devices to facilitate viewing, especially one that is small and boxlike with a magnifying lens, and sometimes a light source, in which a photographic transparency may be viewed.
4.
an eyepiece or viewfinder.
5.
an official inspector of property, public works, or the like.
Origin: 1375–1425; late Middle English; see view, -er1