n. An ecstasy of mind, as if from inspiration or possession by a spiritual influence; hence, a belief or conceit of being divinely inspired or commissioned.n. In general, a natural tendency toward extravagant admiration and devotion; specifically, absorbing or controlling possession of the mind by any interest, study, or pursuit; ardent zeal in pursuit of some object, inspiring energetic endeavor with strong hope and confidence of success.n. An experience or a manifestation of exalted appreciation or devotion; an expression or a feeling of exalted admiration, imagination, or the like: in this sense with a plural: as, his enthusiasms were now all extinguished; the enthusiasm of impassioned oratory.n. Synonyms Earnestness, Zeal, etc. (see eagerness); warmth, ardor, passion, devotion.