1. A socially awkward or tactless act
   "His comment about her weight was an embarrassing solecism";
   - faux pas, gaffe, slip, gaucherie
    
2. An ungrammatical usage of words
   "The editor cringed at the solecism in the first paragraph of the manuscript"

Derived forms: solecisms

Type of: bloomer [informal], blooper [N. Amer, informal], blue [Austral, NZ, informal], blunder, boner [N. Amer, informal], boob [Brit, informal], boo-boo [informal], botch, bungle, flub [N. Amer, informal], foul-up [informal], goof [informal], pratfall [informal]

Encyclopedia: Solecism