D defs.my
Entry 2 senses Webster, 1913

Idiotism

· Id·i·ot·ism · IPA
01 n. An idiom; a form, mode of expression, or signification, peculiar to a language.
  1. 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. 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.