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. 2. Lack of knowledge or mental capacity; idiocy; foolishness. Worse than mere ignorance or idiotism. Shaftesbury. The running that adventure is the greatist idiotism. Ha...
