optical illusion

noun
plural optical illusions

Definition of optical illusion

: a misleading image presented to the vision Zebras look like optical illusions to me. Which are they—black with white stripes or white with black stripes?— Al Robinson The sun, moon, and planets circle above the terrestrial plane in the region of the equator. Their apparent rising and setting is an optical illusion caused by atmospheric refraction …Ranger Rick

Examples of optical illusion in a Sentence

The closer building looks larger than the farther one, but it's just an optical illusion. The two buildings are actually the same size.

First Known Use of optical illusion

1763, in the meaning defined above

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Time Traveler for optical illusion

The first known use of optical illusion was in 1763

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More Definitions for optical illusion

optical illusion

noun

English Language Learners Definition of optical illusion

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

optical illusion

noun

Kids Definition of optical illusion

: something that looks different from what it actually is

optical illusion

noun

Medical Definition of optical illusion

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

More from Merriam-Webster on optical illusion

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Britannica.com: Encyclopedia article about optical illusion

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