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

Industry observers note growing demand for flexible, discreet liquidity solutions that align with volatile markets, entrepreneurial cash-flow needs, and the desire to keep people’s appreciating collections intact. — Tanya Akim, Forbes.com, 22 July 2026

According to courtroom accounts, Maduro appeared in better physical condition than during previous appearances, walking without the limp observers had noted earlier this year. — Antonio María Delgado, Miami Herald, 22 July 2026

But some observers caution the country's largest city and the swing state of Wisconsin are worlds apart. — Gaby Vinick, ABC News, 22 July 2026

For most outsider observers, this was a sign that the SEC might be getting too much credit from the committee. — Ian Miller Outkick, FOXNews.com, 21 July 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