[f. as prec. + -NESS.] The quality of being authoritative.
1659. Cradock, Knowl. & Pract., II. v. (1673), 39. The Majesty of the Style, the Authoritativeness, and Godlike manner of speaking.
1861. Geo. Eliot, Silas M., 58. That self-possession and authoritativeness of voice and carriage which belonged to a man who thought of superiors as remote existences.