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

Observation definition: an act or instance of noticing or perceiving.. See examples of OBSERVATION used 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.

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

There are 14 meanings listed in OED's entry for the noun observation, five of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

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 …

Oct 31, 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.

OBSERVATION meaning: 1 : a statement about something you have noticed a comment or remark; 2 : the act of careful watching and listening the activity of paying close attention to someone or …

ob•ser•va•tion (ob′zûr vā′ shən), n. an act or instance of noticing or perceiving. an act or instance of regarding attentively or watching. the faculty or habit of observing or noticing. notice: to escape a …