n. A gross deviation from the settled usages of grammar; a gross grammatical error, such as “I done it” for “I did it.”n. Loosely, any small blunder in speech.n. Any unfitness, absurdity, or impropriety, as in behavior; a violation of the conventional rules of society.n. An incongruity; an inconsistency; that which is incongruous with the nature of things or with its surroundings; an unnatural phenomenon or product; a prodigy; a monster.n. Synonyms Barbarism, etc. See impropriety.