[f. prec. + -ITY. Cf. Fr. adverbialité.] The state or quality of being adverbial; adverbial form or expression.
1873. Earle, Philol. Eng. Tong., § 441. The termination -ly as the English sign of adverbiality. Ibid., § 444. The requisite display of adverbiality is accomplished with another sort of instrument.
