vastĭtūdo, ĭnis, f. [vastus].
I = vastitas, II. A., ruin , destruction (ante-class.): Mars pater, te precor ... ut tu morbos visos invisosque, viduertatem vastitudinemque, calamitates intemperiasque prohibessis, an old formula of prayer ap. Cato R. R. 141, 2: quae vastitudo haec aut unde invasit mihi? Att. ap. Non. 184, 32 (Trag. Rel. v. 455 Rib.); Pac. ib. (Trag. Rel. v. 314 ib.).—*
II = vastitas, II. B., fearful size , hugeness , immensity : corporis, Gell. 5, 14, 9.