expensive Copy link Outline 1. sumptuōsus (usu. with the idea of magnificent)2. expr. by sumptus, impendium, etc. • expensive: 1. sumptuōsus (usu. with the idea of magnificent): v. sumptuous. 2. expr. by sumptus, impendium, etc.: not to be in the least degree e., ne minimo quidem sumptui esse, Cic. Att. 5, 14: to be very e. to any one, magnum dispendium (impendium) alicui afferre, Col. 4, 24, init.: v. expense. See also costly.