dialecticism noun2 •A dialectal word or phrase (especially if borrowed into another dialect or into 'standard' language).Numerous dialecticisms introduced into the poem reflect the phonetic, morphological, and syntactic differences between dialect and standard language. — 1982 •(rhetoric) The quality of being dialectic.Dialecticism is expressed by the Catholic formula: Union not separation of natures, the unity of person against Nestorius; distinction not confusion of natures against Eutychius and the Monothelites. — 1861 formsdialecticisms