Lewis & Short

thĕātrālis, e, adj. [theatrum], of or belonging to the theatre, theatrical: theatrales gladiatoriique consessus, Cic. Sest. 54, 115: operae, Tac. A. 1, 16: lascivia populi, id. ib. 11, 13: ad theatrales artes degeneravisse, id. ib. 14, 21: licentia, Suet. Dom. 8: lex, concerning the order of sitting in the theatre, Plin. 7, 30, 31, § 117; 33, 2, 8, § 32; Quint. 3, 6, 19: humanitas, i. e. feigned, spurious, id. 2, 2, 10: sermones, i. e. low, vulgar, Sid. Ep. 3, 13 fin.: omnes (montes) theatrali modo inflexi, in the form of a theatre, Plin. 4, 8, 15, § 30.