ebullient /ɪˈbʊliənt/ adjective3 •Enthusiastic; high-spirited.The Spring will come with its ebullient blood, / With flush of roses and imperial eyes — 1908 •(no longer used) Of a liquid: boiling and bubbling, or agitated as if boiling. •(no longer used) Causing heat. formsmore ebullient · most ebullient