noun

delusion

delusion, misconception, fallacy

He is under the delusion that he is a great artist.

He is under the delusion that he is a great artist.

She suffers from delusions of grandeur.

She suffers from delusions of grandeur.

under the delusion that... believing incorrectly that... He is under the delusion that he is famous.

Synonyms: misconception, fallacy, hallucination, illusion

From Latin 'deludere' (to deceive), from 'de-' (down, away) + 'ludere' (to play). Literally 'to play false with'.

A 'delusion' is like an 'illusion' that 'deceives' you. It's a false belief held despite evidence to the contrary.

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