rare. [f. prec. + -NESS.] The state of being aghast; horror.
1881. Punch, 14 May, 221. Mrs. Vamp threw the needful expression of hollow aghastness into her eyes.
1905. Indian Arbiter, 14 Dec., 1/2. Did you ever feel that emotion of aghastness at seeing a woman or child in imminent danger of being mangled?