see--Ebullient. bubbly, lively lively; giving off bubbles giving off gas bubbles; showing high spirits or excitement showing high spirits very excited; bubbling over with high spirits bubbling up from a liquid highly spirited; animated. syn--ebullient,exuberant,jubilant .... Definition of Effervescent something fizzy and giving off bubbles or an enthusiastic and lively personality Examples of Effervescent in a sentence The soda pop was so effervescent, that its bubbles tickled my nose. When I added baking soda to the vinegar, it created an effervescent effect. He had an upset stomach and wanted something effervescent to help calm it. The teacher called her personality effervescent because she was extremely bubbly. The volcano diorama was complete with an effervescent lava special effect.