An idiom; a form, mode of expression, or signification, peculiar to a language. Scholars sometimes give terminations and idiotisms, suitable to their native language, unto words newly invented. M. Hale.
Lack of knowledge or mental capacity; idiocy; foolishness. Worse than mere ignorance or idiotism. Shaftesbury. The running that adventure is the greatist idiotism. Hammond.
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