ˈhumourless, -orless,a. [f. humour n. + -less.] Devoid of humour. Hence ˈhumourlessness. 1847Craig, Humorless.1875N. Amer.Rev. CXX. 279 One of these humorless sublime utopias.1890Sat.Rev. 13 Sept. 308/2 That total inability to see yourself as others see you..the child of humourlessness.