observation

American  

[ob-zur-vey-shuhn] / ˌɒb zɜrˈveɪ ʃən /

noun

1. an act or instance of noticing or perceiving.

2. an act or instance of regarding attentively or watching.

3. the faculty or habit of observing or noticing.

   Synonyms:

   attention

4. notice.

   to escape a person's observation.

5. an act or instance of viewing or noting a fact or occurrence for some scientific or other special purpose.

   the observation of blood pressure under stress.

6. the information or record secured by such an act.

7. something that is learned in the course of observing things.

   My observation is that such clouds mean a storm.

8. a remark, comment, or statement based on what one has noticed or observed.

   Synonyms:

   opinion, pronouncement

9. the condition of being observed.

10. Navigation.

    1. the measurement of the altitude or azimuth of a heavenly body for navigational purposes.

    2. the information obtained by such a measurement.

11. Obsolete. observance, as of the law.

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observation British  

/ ˌɒbzəˈveɪʃən /

noun

1. the act of observing or the state of being observed

2. a comment or remark

3. detailed examination of phenomena prior to analysis, diagnosis, or interpretation

   the patient was under observation

4. the facts learned from observing

5. an obsolete word for observance

6. nautical

   1. a sight taken with an instrument to determine the position of an observer relative to that of a given heavenly body

   2. the data so taken

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Synonym Usage

See remark.

Other Word Forms

Derived Forms

• preobservation
  noun
• observationally
  adverb
• observational
  adjective
• self-observation
  noun
• reobservation
  noun
• nonobservation
  noun

Etymology

Origin of observation

First recorded in 1350–1400; Middle English, from Latin observātiōn-, stem of observātiō “attention, inspection, surveillance,” from observāt(us) “watched” (past participle of observāre “to watch, regard, attend to”; see observe) + -iō -ion

Explanation

When you take a good look at something, noticing facts or taking measurements, you are engaging in observation, something a little more intense than just a quick glance. When you share an observation, you communicate an insight. The Latin verb observāre, "to attend to," is the foundation for our word observation, which requires that you pay attention. If a hospital holds you overnight for observation, they want to keep an eye on your condition. If you have a lot of funny or interesting observations on a topic, maybe you should write a book. Scouts founder Robert Baden-Powell once said, "If you make listening and observation your occupation you will gain much more than you can by talk."

Example Sentences

An observation deck on its roof would offer sweeping views of the city.

From Los Angeles Times • Jun. 8, 2026

Part-sculpted work and marble block, each has a tragic aspect to it, recalling John Greenleaf Whittier’s forlorn observation: “For of all sad words of tongue or pen, The saddest are these: ‘It might have been!’

From The Wall Street Journal • Jun. 7, 2026

This strikes me as an observation about a democracy responding to its citizens.

From Slate • Jun. 6, 2026

In town, a few residents wandered through a mostly empty shopping mall, while members of the security forces ate ice lollies at an observation point under the blazing sun.

From Barron's • Jun. 4, 2026

As amazing as this observation was, it was not what Hubble is best remembered for.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife

Related Words

• conclusion
• consideration
• examination
• experience
• information
• inspection
• investigation
• knowledge
• measurement
• note
• perception
• remark
• research
• review
• study
• surveillance
• view