human, individual, mortal, person, somebody, someone, soul - a human being; "there was too much for one person to do"

eyeglass wearer - a person who wears spectacles in order to see better

discoverer, finder, spotter - someone who is the first to observe something

attender, auditor, hearer, listener - someone who listens attentively

audile - one whose mental imagery is auditory rather than visual or motor

motile - one whose prevailing mental imagery takes the form of inner feelings of action

noticer - someone who takes notice; "a careful noticer of details"

seer - an observer who perceives visually; "an incurable seer of movies"

looker, spectator, viewer, watcher, witness - 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"

visualiser, visualizer - one whose prevailing mental imagery is visual

witness, witnesser, informant - someone who sees an event and reports what happened

expert - a person with special knowledge or ability who performs skillfully

annotator - a commentator who writes notes to a text