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

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.

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 is the act of closely watching or noticing something or someone, often with the intention of gathering information or learning about their behavior, characteristics, or surroundings.

4 days ago · Observation is the foundation of nearly every reliable way humans gather knowledge, from diagnosing a disease to discovering a new drug to learning how to speak. It sounds simple, but the …

4 days ago · Observation in research is the careful study of behavior, events, or social interaction as they happen. Researchers watch, listen and record what they see in a systematic way.

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