The meaning of OBSERVATION is an act or instance of observing a custom, rule, or law. How to use observation in a sentence.

In living organisms, observation typically occurs through the senses. In science, it often extends beyond unaided perception, involving the use of scientific instruments to detect, measure, and record data.

OBSERVATION definition: an act or instance of noticing or perceiving. See examples of observation used in a sentence.

OBSERVATION definition: 1. the act of observing something or someone: 2. the fact that you notice or see something: 3. a…. Learn more.

Discover everything about the word "OBSERVATION" in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide.

Define observation. observation synonyms, observation pronunciation, observation translation, English dictionary definition of observation. n. 1. a. The act of observing: observations of a rare bird. b. The …

Dec 14, 2025 · The physics of elementary particles in the 20th century was distinguished by the observation of particles whose existence had been predicted by theorists sometimes decades earlier.