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English definition of “observation”

observation

noun uk   /ˌɒb.zəˈveɪ.ʃən/ us    /ˌɑːb.zɚ-/

observation noun (WATCHING)

B2 [U] the act of observing something or someone: close observation of nature/human nature/animal behaviour The police are keeping the suspect under observation. She was admitted to hospital for observation (= so that doctors could watch her and see if anything was wrong with her).Using the eyesEyesight, glasses and lensesThe eye and surrounding areaPerceptive

observation noun (NOTICING)

B2 [U] the fact that you notice or see something: She has remarkable powers of observation (= is very good at noticing things).Using the eyesEyesight, glasses and lensesThe eye and surrounding areaPerceptive C1 [C] formal a remark about something that you have noticed: The book is full of interesting observations on/about the nature of musical composition. May I make an observation?Remarks and remarkingExpressing and asking opinions
(Definition of observation from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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