01 n. An idiom; a form, mode of expression, or signification, peculiar to a language.
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1.
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.
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2.
Lack of knowledge or mental capacity; idiocy; foolishness.“Worse than mere ignorance or idiotism.” — Shaftesbury.“The running that adventure is the greatist idiotism.” — Hammond.