Definition: (1) overflowing with enthusiasm; high-spirited; showing much exuberance or exhilaration; (2) A sudden rush of joy

Derivation: Latin, “boiling” or “bubbling”

Too Far: Over the top all of the time

• Positive emotion can be about the past, the present, or the future. The positive emotions about the future include optimism, hope, faith, and trust. Those about the present include joy, ecstasy, calm, zest, ebullience, pleasure, and (most importantly) flow; these emotions are what most people usually mean when they casually-but much too narrowly-talk about “happiness.” The positive emotions about the past include satisfaction, contentment, fulfillment, pride, and serenity. — Martin Elias Peter Seligman (1942-) American psychologist & author
• But it is possible, it is possible: the old grief, by a great mystery of human life, gradually passes into quiet, tender joy; instead of young, ebullient blood comes a mild, serene old age: I bless the sun’s rising each day and my heart sings to it as before, but now I love its setting even more, its long slanting rays, and with them quiet, mild, tender memories, dear images from the whole of a long and blessed life and over all is God’s truth, moving, reconciling, all-forgiving! — Fyodor Mikhailovich Dostoyevsky (1821-1881) Russian novelist