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Meaning of “optical illusion” - Learner’s Dictionary

optical illusion

noun [C]    
something that you think you see, but which is not really thereUnreal things and unreality
Translations of “optical illusion”
in Chinese (Traditional) 視錯覺, 光幻覺…
in Russian оптический обман…
in Turkish göz yanılması, optik yanılsama…
in Chinese (Simplified) 视错觉, 光幻觉…
in Polish złudzenie optyczne…
(Definition of optical illusion from the Cambridge Learner’s Dictionary © Cambridge University Press)
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