observer
One who watches
An observer is someone who watches or notices something.
In formal settings, an observer attends meetings or events without participating: The UN sent observers to monitor the election.
Scientific observers record data systematically.
In physics, the observer holds special significance—relativity and quantum mechanics both depend on the observer's frame of reference.
Someone who is a keen observer notices details others miss.
Gathered viewers collectively
- onlookerPerson who observes
- bystanderOne who observes nearby
- viewerOne who observes visually
- witnessOne who attests
watcher · crowd · gallery · attendee · fan · patron · theater · stadium
Safety backup person
- reconnaissanceInformation-gathering before action
- scoutOne who reconnoiters
- lookoutWatcher or vista point
- sentinelGuard who monitors
patrol · surveillance · artillery · post · station · perimeter · watch · duty
One who notices
- witnessOne who attests
- consciousnessState of sentient awareness
- subjectivityPersonal viewpoint coloring perception
- objectivityFreedom from personal bias
perspective · viewpoint · detachment · participant · phenomenology · relativity · quantum · measurement problem
Ongoing observation of something
- watchdogGuard or monitor
- spyingSecretly observing others
- reconnaissanceInformation-gathering before action
- intelligenceMental ability, cognitive capacity
CCTV · wiretap · eavesdropping · tracking · satellite · drone · security · camera
Display or supervisor
- inspectorOfficial quality checker
- auditorFinancial records examiner
- assessorOne who estimates value
- evaluatorOne who assesses merit
referee · umpire · adjudicator · peacekeeping · neutral · impartial · delegate · envoy
Printed periodical of current events
- pressApply force downward
- correspondentJournalist covering distant events
- reporterOne who gathers news
- columnistRecurring newspaper feature writer
commentator · analyst · critic · bureau · foreign correspondent · press corps · embed · coverage
Instrument magnifying faraway objects
- astronomerCelestial bodies researcher
- dataFacts for analysis
- measurementDetermining size or amount
- experimentSystematic investigation procedure
laboratory · field study · notation · recording · documentation · protocol · objectivity · empirical
audience
Gathered viewers collectively
witness · watcher · crowd · gallery · attendee · fan · patron · theater · stadium · arena
spotter
Safety backup person
- reconnaissanceInformation-gathering before action
- scoutOne who reconnoiters
- lookoutWatcher or vista point
sentinel · patrol · surveillance · artillery · post · station · perimeter · watch · duty · sighting
perceiver
One who notices
- witnessOne who attests
- consciousnessState of sentient awareness
- subjectivityPersonal viewpoint coloring perception
objectivity · perspective · viewpoint · detachment · participant · phenomenology · relativity · quantum · measurement problem · Heisenberg
monitoring
Ongoing observation of something
- watchdogGuard or monitor
- spyingSecretly observing others
- reconnaissanceInformation-gathering before action
intelligence · CCTV · wiretap · eavesdropping · tracking · satellite · drone · security · camera · undercover
monitor
Display or supervisor
evaluator · referee · umpire · adjudicator · peacekeeping · neutral · impartial · delegate · envoy · watchdog
newspaper
Printed periodical of current events
- pressApply force downward
- correspondentJournalist covering distant events
- reporterOne who gathers news
columnist · commentator · analyst · critic · bureau · foreign correspondent · press corps · embed · coverage · dispatch
telescope
Instrument magnifying faraway objects
- astronomerCelestial bodies researcher
- dataFacts for analysis
- measurementDetermining size or amount
experiment · laboratory · field study · notation · recording · documentation · protocol · objectivity · empirical · methodology
- observerswatcher, onlooker, spectator, viewer, bystander
- spectatorsviewer, watcher, onlooker, audience, bystander
- poll workerspoll worker, election judge, ballot counter, vote counter, registrar
- bystandersbystander, onlooker, spectator, watcher, viewer
- perceiversperceiver, watcher, viewer, looker, listener
- Dissociationdissociation, depersonalization, derealization, multiple personality disorder, alter
- under observationBeing carefully watched
- observation decksElevated platforms for panoramas
- casual observer
- observation towerElevated structure for viewing
- religious observancePractice of faith duties
- observation roomEnclosed space for watching
observe, observant, observation, observed, observing, observance, observable, observations, unobserved