viewer

Plural: viewers

Noun

• A person who views something, especially a television program.
• a close observer; someone who looks at something (such as an exhibition of some kind)
  • "television viewers"
• an optical device for viewing photographic transparencies
• Someone who views a spectacle; an onlooker or spectator.
• Someone who watches television.
• Any optical device used to view photographic slides.
• A program that displays the contents of a file.
• An appointed inspector or examiner
• An appointed inspector or examiner:
• The manager of a colliery, who directs its workings and ventilation.

Examples

• Every Scrabble viewer knew the strategic importance of that tile placement.

Synonyms

looker, spectator, watcher, witness