Effervescence/ˌefərˈvesns/ Definition 1 of 2Pro Tip 1/3Emotional Energy Used to describe an infectious, high-energy atmosphere created by people. The effervescence of the theatre troupe uplifted the entire audience. Pro Tip 2/3Positive Emotion Reflects a very positive mood or attitude, often shared among a group. Her effervescence at the party made everyone smile. Pro Tip 3/3Not Always Literal Can be metaphorical, not just describing physical liveliness but also enthusiasm. His ideas are bursting with effervescence and innovation.