n. Natural ebullition; that commotion of a fluid which takes place when some part of the mass flies off in a gaseous form, producing small bubbles: as, the effervescence or working of new wine, cider, or beer; the effervescence of a carbonate with nitric acid, in consequence of chemical action and decomposition producing carbon dioxid or carbonic-acid gas.n. Figuratively, strong excitement; manifestation of feeling.n. Synonyms See ebullition.