humorism noun2 •(historical) The theory of the influence of the humors (body fluids) in the production of disease. •The manner or disposition of a humorist; humorousness.July 30, 1831, Samuel Taylor Coleridge, Asgill, the French I expected to find the ravings of an enthusiast, or the sullen snarlings of an infidel; whereas I found the very soul of Swift–an intense half self-deceived humorism.