calamitously,adv.|kəˈlæmɪtəslɪ| [f.prec. + -ly2.] In a calamitous manner; disastrously. 1794Ld. Auckland Corr. (1862) III. 232 Every subject in which he has borne a part..has ended calamitously.1896Home Missionary (N.Y.) July 145 Churches..brought suddenly and calamitously into missionary conditions.