delusion

/dɪˈluʒən/
noun
  1. A false belief or opinion that is held despite strong evidence against it, often as a result of mental illness or misunderstanding.
    • It's a common delusion among new investors that they can get rich overnight without any risk.
    • He suffered from the delusion that everyone was plotting against him.
    • Her delusion that she could fly led her to climb onto the roof.
  2. The act of deceiving someone or the state of being deceived; a trick or false impression.
    • He lived under the delusion that his friends were always honest with him.
    • The advertisement was a delusion designed to make people buy a useless product.
    • The magician's trick was a clever delusion that fooled the entire audience.
Antonyms
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