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[uh b-zur-ver] /əbˈzɜr vər/

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.

Also called air observer, aircraft observer. U.S. Army. a person who serves in an aircraft as a reconnoiterer and directs artillery fire.
a person or thing that observes
a person who attends a conference solely to note the proceedings
a person trained to identify aircraft, esp, formerly, a member of an aircrew

1550s, “one who keeps a rule, custom, etc.,” agent noun from observe. Meaning “one who watches and takes notice” is from 1580s; this is the sense of the word in many newspaper names.


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