1. a nonstandard usage or grammatical construction 2. a violation of etiquette 3. an impropriety, mistake, or incongruity

Solecism appears in an article in Philosophy and Literature, a journal of John Hopkins University Press:

Many had pointed out the solecisms of Butler, runner-up Homi Bhabha, and previous awardees, and the abstract, twisting grandiloquence of critical theory with a progressive slant was already well known in academic circles.