Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun onlooker

1 sense of onlooker

Sense 1
onlooker, looker-on -- (someone who looks on)
       => spectator, witness, viewer, watcher, looker -- (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")