a nonstandard or ungrammatical usage, as unflammable and they was.
2.
a breach of good manners or etiquette.
3.
any error, impropriety, or inconsistency.
Origin: 1570–80; < L soloecismus < Gk soloikismós, equiv. to sóloik(os) (Sólo(i) a city in Cilicia where a corrupt form of Attic Greek was spoken + -ikos-ic) + -ismos-ism
[sol-uh-siz-uh
m, soh-luh-] 