a. rare. [f. L. tumul-us, TUMULUS + -OUS: cf. prec.] a. = prec. (rare–0). b. Forming a tumulus; tumular.
1828. Webster, Tumulous, full of hills.
1897. Daily News, 21 Sept., 8/3. Parcels built up in tumulous columns, which rise from the floor nearly up to the ceiling.
