Dictionary and Thesaurus

Definition of Preposterous

• (a.) Having that first which ought to be last; inverted in order.
• (a.) Contrary to nature or reason; not adapted to the end; utterly and glaringly foolish; unreasonably absurd; perverted.

Synonyms of Preposterous

• Absurd
• Cockeyed
• Derisory
• Idiotic
• Laughable
• Ludicrous
• Nonsensical
• Ridiculous

Antonyms of Preposterous

Homophones of Preposterous