observer
Americannoun
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someone or something that observes.
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a delegate to an assembly or gathering, who is sent to observe and report but not to take part officially in its activities.
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U.S. Air Force.
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a member of an aircrew, other than the pilot, holding an aeronautical rating.
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a person who maintains observation in an aircraft during flight.
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Also called air observer,. Also called aircraft observer. U.S. Army. a person who serves in an aircraft as a reconnoiterer and directs artillery fire.
noun
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a person or thing that observes
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a person who attends a conference solely to note the proceedings
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a person trained to identify aircraft, esp, formerly, a member of an aircrew
Other Word Forms
Derived Forms
Etymology
Origin of observer
Explanation
An observer is someone who watches or pays attention to something — if you're an observer of current events, you probably watch the news and read the newspaper every day to keep up with what's going on. You can be an accidental observer of something, like pedestrians who happen to witness an accident and become observers of it. Another kind of observer is one who notices things deliberately, like political observers who watch and comment on various events. Many newspapers once had the word observer in their names, from this second sense of the word. The verb observe has a Latin root, observare, which means "watch over, note, heed, or attend to."
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Nature observer and broadcaster Iolo Williams was on a wildlife cruise filming Springwatch when he heard about the sighting.
From BBC • Jun. 9, 2026
While this happened, researchers recorded activity throughout the observer fish's entire brain in real time.
From Science Daily • Jun. 2, 2026
Parsons is one such clear-eyed observer, able to take an internet phenomenon like liminal spaces and pick apart that fascination, studying what prompts the uncanny allure and transforming his findings into a complete, complex thesis.
From Salon • May 30, 2026
The scuttling of too many legs, combined with the spider’s habit of suddenly vanishing from sight, give even the most stalwart observer a case of the shivers.
From The Wall Street Journal • May 15, 2026
What impressed me most as an observer was the entrance to the A train on 125th Street and St. Nicholas Avenue.
From "Bad Boy" by Walter Dean Myers
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
