A person who becomes aware (of things or events) through the senses.

synonyms: observer, perceiver, percipient.

Roget 444: spectator, beholder, observer, looker-on, onlooker, witness, eyewitness, bystander, passer by; sightseer; rubberneck, rubbernecker [U.S.].    spy; sentinel etc. (warning) 668.    ... show more

Dutch: nalever, observant, observator, waarnemer