Noun
viewer -
an optical device for viewing photographic transparencies
optical device a device for producing or controlling light
viewer -
a close observer; someone who looks at something (such as an exhibition of some kind); "the spectators applauded the performance" ; "television viewers" ; "sky watchers discovered a new star"
spectator ,
witness ,
watcher ,
looker
beholder ,
perceiver ,
percipient ,
observer a person who becomes aware (of things or events) through the senses
browser a program used to view HTML documents
bystander a nonparticipant spectator
cheerer a spectator who shouts encouragement
eyewitness a spectator who can describe what happened
gawker a spectator who stares stupidly without intelligent awareness
motion-picture fan ,
moviegoer someone who goes to see movies
ogler a viewer who gives a flirtatious or lewd look at another person
looker-on ,
onlooker someone who looks on
playgoer ,
theatergoer ,
theatregoer someone who attends the theater
rubbernecker ,
rubberneck a person who stares inquisitively
spy (military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors
starer a viewer who gazes fixedly (often with hostility)