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

Some observers are uneasy that his proposals lack specifics. —Alexander Smith, NBC news, 11 Apr. 2026

Some observers suggest that seekers aren’t chasing hollow shortcuts online. —Lucy Jones april 11, Miami Herald, 11 Apr. 2026

Binyamin Appelbaum is an editorial observer for The New York Times. —Binyamin Appelbaum, Mercury News, 10 Apr. 2026

Its images had become a mainstay for observers of the events in the Middle East in recent years. —Geoff Brumfiel, NPR, 10 Apr. 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