noun. A person who is present at an event without participating in it.

noun. One who stands near; a spectator; a chance looker-on; hence, one who has no concern with the business being transacted.

noun. One of the highest order of penitents in the discipline of the early church. See consistentes.

noun. One who stands near; a spectator; one who has no concern with the business transacting.

noun. a person who, although present at some event, does not take part in it; an observer or spectator

noun. a nonparticipant spectator

"I will use the term participation unit to refer both to encounters and to unengaged participants; the term bystander will be used to refer to any individual present who is not a ratified member of the particular encounter in question, whether or not he is currently a member of some other encounter."

looker  spectator  viewer  watcher  witness  

hearer  inquirer  listener  observer  on-looker  

TV-viewer  abutter  adjoiner  attestant  attestator