so ‧ le ‧ cis ‧ m /ˈsɒləsɪz ə m, ˈsɒlɪsɪz ə m $ ˈsɑː-/ BrE AmE noun [countable] formal
[ Date: 1500-1600 ; Language: Latin ; Origin: soloecismus , from Greek , from soloikos 'speaking incorrectly' , from Soloi ancient city in Turkey where an incorrect form of Greek was spoken ]
1 . a mistake in the use of written or spoken language
2 . something that is not considered polite behaviour:
a social solecism