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| Date: | 1400-1500 |
| Language: | Latin |
| Origin: | fallacia, from fallere 'to deceive' |
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fal‧la‧cy
plural fallacies
plural fallacies1 [countable] a false idea or belief, especially one that a lot of people believe is true [= misconception]: It's a common fallacy that a neutered dog will become fat and lazy.
It's a common fallacy that a neutered dog will become fat and lazy.2 [uncountable and countable] formal a weakness in someone's argument or ideas which is caused by a mistake in their thinking
