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.

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: 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.

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 …

Mar 2, 2026 · 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 definition: An inference, judgment, or remark that is made by observing.

Observation is the action or process of carefully watching someone or something. In hospital she'll be under observation all the time. An observation is something that you have learned by seeing or …

These facts are based on close observation of the birds in the wild. Children learn by observation. The author's excellent powers of observation [=ability to notice and pay close attention to things] are …

Definition of observation noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.