observer

noun ob·serv·er \ əb-ˈzər-vər \
|Updated on: 11 Jun 2018

Definition of observer

: 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

Examples of observer in a Sentence

  1. According to one observer, the event was poorly organized.

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

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

  4. Observers say the economy is improving.

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

Recent Examples of observer from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'observer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of observer

circa 1550

in the meaning defined above

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observer Synonyms



OBSERVER Defined for English Language Learners

observer

Definition of observer for English Language Learners

  • : a person who sees and notices someone or something

  • : a person who pays close attention to something and is considered to be an expert on that thing

  • : a person who is present at something (such as a meeting) in order to watch and listen to what happens



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