observer

noun

ob·​serv·​er əb-ˈzər-vər 

: one that observes: such as

a

: a representative sent to observe but not participate officially in an activity (such as a meeting or war)

b

: an expert analyst and commentator in a particular field

political observers

Synonyms of observer

• spectator
• viewer

Examples of observer in a Sentence

According to one observer, the event was poorly organized.

The star is not visible to an observer without a telescope.

According to one military observer, this change comes after years of planning.

Observers say the economy is improving.

The class has an observer today, so please be on your best behavior.

Recent Examples on the Web

Coleman found instructive a 1938 ruling in favor of the Pittsburgh Pirates, who challenged a radio station that placed observers on a rooftop next to Forbes Field and paid them to provide play-by-play for an unauthorized radio broadcast. — Michael McCann, Sportico.com, 15 Oct. 2026

Such actions are scaring people away from coming to court, whether as witnesses, defendants or observers, Bonta said, and amount to a blatant abuse of power. — Sharon Bernstein, Sacbee.com, 15 Oct. 2026

As a highly knowledgeable observer of hip-hop trends, Bun B hasn’t been surprised to see the way that Drake’s career has bounced back from the negative headlines of 2024 and 2025. — Simon Vozick-Levinson, Rolling Stone, 15 Oct. 2026

To a Chinese observer, those moves probably look rather strategic. — Glenn Zorpette, IEEE Spectrum, 15 Oct. 2026

Word History

Etymology

observe + -er entry 2

First Known Use

circa 1550, in the meaning defined above

Phrases Containing observer

• casual observer
• inter-observer

Rhymes for observer

• preserver
• fervor
• fervour
• server