n. An offense against purity of style or language; originally, the mixing of foreign words and phrases in Latin or Greek; hence, the use of words or forms not made according to the accepted usages of a language: limited by some modern writers on rhetoric to an offense against the accepted rules of derivation or inflection, as hisn or hern for his or her, gooses for geese, goodest for best, pled for pleaded, proven for proved.n. A word or form so used; an expression not made in accordance with the proper usages of a language.n. An uncivilized state or condition; want of civilization; rudeness of life resulting from ignorance or want of culture.n. An act of barbarity; an outrage.n. Synonyms Barbarism, Solecism, etc. See impropriety.n. In anthropology, the conditions of barbarian society. See barbarian, a., 5.