Simple Definition of viewer
: a person who watches television
: a person who sees or looks at something
: a device that is used to look at photographs
Examples of viewer in a sentence
The program attracts millions of viewers every week.
She is a regular viewer of the evening news.
The exhibit was surrounded by a large crowd of viewers.
First Known Use of viewer
Seen and Heard
What made you want to look up viewer? Please tell us where you read or heard it (including the quote, if possible).