/ Dictionary / Index S solecism: Meaning and Definition of Find definitions for: sol•e•cism Pronunciation: (sol'u-siz"um, sō'lu-), [key] — n. a nonstandard or ungrammatical usage, as unflammable and they was. a breach of good manners or etiquette. any error, impropriety, or inconsistency. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: solecism (Thesaurus) sole sole custody Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language