- The definition of an observer is a person watching something, or a member of an aircraft crew or the armed forces who watches and reports.
An example of an observer is a student taking notes on how teachers run their classes.
A group of observers at a seminar.
- a person who observes something; specif.,
- a soldier manning an observation post
- a person who attends an assembly, convention, etc., not as an official delegate but only to observe and report the proceedings
- an official, usually a member of a group, sent by a UN committee to collect and report facts on the situation in a special area
- a member of an aircraft crew, other than a pilot, with certain specialized duties and a special rating ()
- One who observes: an observer of local customs; observers of religious holidays.
- One who is sent to observe and report on events or proceedings without directly participating in them.
- a. A crew member on a military aircraft who makes observations.b. A member of an armed force who watches and reports from an observation post.
- One who makes observations, monitors or takes notice
- Most impartial observers agreed that Sampras had not served well.
- One who adheres or follows laws, guidelines, etc.
- I shall be an observer of the local customs.
- A person sent as a representative, to a meeting or other function to monitor but not to participate
- The UN sent many observers to the country's first elections.
- (military) A crew member on an aircraft who makes observations of enemy positions or aircraft
- The only crew-member to survive the crash was the Canadian observer.
- (military) A sentry etc. manning an observation post
- We waited till dusk when the observers' vision was poorest.