Dictionary

optical illusion

noun

: something that looks different from what it is : something that you seem to see but that is not really there

Full Definition of OPTICAL ILLUSION

:  illusion 2a(1)
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First Known Use of OPTICAL ILLUSION

1794
OPTICAL ILLUSION Defined for Kids

optical illusion

noun

Definition of OPTICAL ILLUSION for Kids

:  something that looks different from what it actually is
Medical Dictionary

optical illusion

noun

Medical Definition of OPTICAL ILLUSION

:  visual perception of a real object in such a way as to misinterpret its actual nature

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