Id"i*ot*ism (?), n. [F. idiotisme, L. idiotismus the way of fashion of a private person, the common or vulgar manner of speaking, Gr. , fr. to put into or use common language, fr. . See Idiot.]
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.
Lack of knowledge or mental capacity; idiocy; foolishness.
Worse than mere ignorance or idiotism.
The running that adventure is the greatist idiotism.
© Webster 1913.