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en.wikipedia.org/wiki/Observation

Observation is the active acquisition of information from a primary source. In living beings ... The standard unit can be an artifact, process, or definition which can be duplicated or shared by all observers. In measurement the number of standard ...

www.dictionary.com/browse/observation

Observation definition, an act or instance of noticing or perceiving. See more.

www.merriam-webster.com/dictionary/observation

Define observation: an act or instance of observing a custom, rule, or law; observance — observation in a sentence.

www.collinsdictionary.com/us/dictionary/english/observation

Observation definition: Observation is the action or process of carefully watching someone or something. | Meaning, pronunciation, translations and examples.

en.oxforddictionaries.com/definition/observation

Definition of observation - the action or process of closely observing or monitoring something or someone, a statement based on something one has seen, heard ...

www.yourdictionary.com/observation

The definition of an observation is the act of noticing something or a judgment or inference from something seen or experienced. An example of observation is ...

www.vocabulary.com/dictionary/observation

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 ...

www.learnersdictionary.com/definition/observation

Definition of observation written for English Language Learners from the Merriam -Webster Learner's Dictionary with audio pronunciations, usage examples, and ...

dictionary.cambridge.org/us/dictionary/english/observation

observation definition, meaning, what is observation: the act of observing something or someone: . Learn more.