joyous
adjective
her joyous expression:
joyful, cheerful, happy, jolly, merry, bright, sunny, light-hearted, in good spirits, in high spirits, sparkling, bubbly, effervescent, exuberant, ebullient, cock-a-hoop, breezy, airy, cheery, sprightly, jaunty, smiling, grinning, beaming, laughing, mirthful, radiant;
jubilant, overjoyed, beside oneself with joy, thrilled, ecstatic, euphoric, blissful, on cloud nine/seven, elated, delighted, glad, gleeful, gratified;
jovial, genial, good-humoured, happy-go-lucky, carefree, unworried, untroubled, without a care in the world, full of the joys of spring;
buoyant, optimistic, hopeful, full of hope, positive;
content, contented;
informal upbeat, chipper, chirpy, peppy, smiley, sparky, over the moon, on top of the world;
North American, informal peart;
dated gay;
Australian, New Zealand, informal wrapped;
literary jocund, gladsome, blithe, blithesome;
archaic of good cheer.
▷antonyms sad, miserable.
joyous Oxford Dictionary of English