Jisho

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Noun, Suru verb, Transitive verb, Noun which may take the genitive case particle 'no'
1. optical illusion; hallucination
Noun, Suru verb, Transitive verb, Noun which may take the genitive case particle 'no'
2. misapprehension; delusion
Wikipedia definition
3. IllusionAn illusion is a distortion of the senses, revealing how the brain normally organizes and interprets sensory stimulation. While illusions distort reality, they are generally shared by most people. Illusions may occur with more of the human senses than vision, but visual illusions, optical illusions, are the most well known and understood. The emphasis on visual illusions occurs because vision often dominates the other senses.
Read “Illusion” on English Wikipedia
Read “錯覚” on Japanese Wikipedia
Read “Illusion” on DBpedia

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