Exhilaration is great joy, and excitement and liveliness! When you ride an ocean wave, hear a favorite song, or have a long and uncontrollable laugh with friends, there's a feeling of exhilaration, an overflow of happiness.
Most people have moments of exhilaration (egg-zill-uh-RAY-shun), sometimes during life's big moments, like a graduation or wedding, and often while just walking down the street and feeling great about the day and being alive. And exhilaration is contagious: when you witness someone else's exhilaration, it usually makes you full of warmth and joyousness too. Some synonyms of exhilaration also sound close to it, like "exultation," "exaltation," and "elation." As they say, it's all good.