Observer

What is Observer?

Observer definition and meaning on Dictionary terms:
noun

someone or something that observes.
a delegate to an assembly or gathering, who is sent to observe and report but not to take part officially in its activities.
U.S. Air Force.

  1. a member of an aircrew, other than the pilot, holding an aeronautical rating.
  2. a person who maintains observation in an aircraft during flight.
Also called air observer, aircraft observer. U.S. Army. a person who serves in an aircraft as a reconnoiterer and directs artillery fire.