a substandard or ungrammatical usage; a breach of etiquette; any impropriety or mistake. a breach of good manners or etiquette or any error or inconsistency. Synonym of: fallacy 1. A mistake in speech or writing. 2. An impolite or improper way of behaving. A. A nonstandard or improper form of dialect was spoken B. A mistake in manners or behavior. à¦¬à¦¾à¦à§à¦¯à¦à¦ à¦¨à¦ªà§à¦°à¦£à¦¾à¦²à§à¦° à¦¨à¦¿à¦¯à¦¼à¦à¦­à¦à§à¦ solecism à¦°à§à¦¤à¦¿à¦¦à§à¦·à§à¦à¦¤à¦¾ solecism à¦à¦¶à¦¿à¦·à§à¦ à¦ªà§à¦°à§à§à¦ solecism. Definition of Solecism something that isn\\'t seen as normal or appropriate; a deviation from the norm Examples of Solecism in a sentence According to the fashion critic, the actress committed a major solecism when she wore white after Labor Day. The soldier executed a solecism of protocol when he neglected to salute his commanding officer. When the quarterback committed a large solecism, he cost his team the game. The judge reprimanded the lawyer who exhibited a solecism in court protocols. At the finishing school, I learned how to avoid making a major solecism during social events. a socially awkward or tactless act Mother Anna was always on guard against any solecism from her children and scolded them immediately if any of them talked out of place in public. ***This word has other definitions but this is the most important one for the GRE.