accidentality|ˌæksɪdənˈtælɪtɪ| [f. accidental + ity.] Accidental state or quality, casualness; = accidentalness. 1651N. Biggs New Dispens. 168 In this only supposed Accidentality.1831Coleridge Table Talk 147 I wish..to take from history it's accidentality, and from science it's fatalism.