a. rare. [f. LUMBER sb.1 + -OUS.] Heavy and unwieldy; lumbering.
1847–8. H. Miller, First Impr., xi. (1857), 170. The lumbrous dignity of Shenstone’s elegiacs.
1887. Hall Caine, Deemster, ii. (1888). A lumbrous, jolting sound of heavy wheels.
