Delusion - Already

Japanese: 妄想 - もうそう

〘Noun〙 (formerly "mouzo")① (━suru) Buddhist term. To mistakenly believe that something that is not true is true due to a trapped mind. Also, such a mistaken thought. Evil thoughts. *Suga Kagoshu (c. 903), Autumn evening, titled Shiragiku, "With my eyes wide open, I see some delusions, Wang Hong, who is drunk and has become a convenient resident." [Engaku Sutra]② (━suru) To wildly imagine something that cannot exist. To indulge in lewd thoughts. Also, such imagination. Boso. [Nippo Jisho (1603-04)] *A Certain Woman (1919), Arishima Takeo, 27, "I had various delusions about the relationship between Kurachi and his wife."③ A state in which one is convinced that something unreasonable is true even when there is no particular basis for it, and refuses to accept it even if it is proven wrong. It appears as a symptom of various mental illnesses.

Bousou bausau [delusion]

〘 noun 〙 To imagine something without any basis. It's true. ※Dreams of the Future of Living in the Mainland (1886) by Shoyo Tsubouchi, vol. 12 "When I listen to you, there are so many delusions that are sometimes laughable ."

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙 (古くは「もうぞう」)① (━する) 仏語。とらわれの心によって、真実でないものを真実であると、誤って意識すること。また、そのような迷った考え。邪念。※菅家後集（903頃）秋晩題白菊「老眼愁看何妄想、王弘酒使便留居」〔円覚経〕② (━する) ありえないことを、みだりに想像すること。みだらな考えにふけること。また、そのような想像。ぼうそう。〔日葡辞書（1603‐04）〕※或る女（1919）〈有島武郎〉二七「倉地の夫婦関係を種々に妄想したり」③ 特に根拠がないのに不合理なことを事実と確信し、誤りを立証しても承知しない状態。いろいろな精神病の症状として現われる。