n. One who looks on; an onlooker or eyewitness; a beholder; especially, one of a company present at a spectacle of any kind: as, the spectators of or at a game or a drama.n. Synonyms Looker-on, onlooker, observer, witness, by-stander. A person is said to be a spectator at a show, a bullfight, a wrestling-match; one of the audience at a lecture, a concert, the theater; and one of the congregation at church.