Violating or opposed to the rules and conventions of grammar; grammatically incorrect or defying standard linguistic structure.
From anti- (against) + grammatical (relating to grammar). A rare but logical compound used in linguistics and literary criticism to describe language that deliberately breaks grammatical rules.
Many poets like e.e. cummings and James Joyce created antigrammatical sentences on purpose—breaking grammar rules actually helped them express things that 'correct' grammar couldn't!
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