a person standing near but not taking part in an event or activity

person who watches

a person who watches something happening without taking part

person observing an event

a person looking at (a sport, game, show etc)

person who watches event

a person watching a television programme

witness

a person who was actually present at an event and should, for this reason, be able to describe it; a person who gives evidence under oath in a law court

person who observes an event