giddy

1 lacking in seriousness or maturity the giddy youngsters continued to laugh, joke, and make faces during the ceremonies the old guy's having an affair with a giddy twentysomething Synonyms birdbrained, ditzy (or ditsy), dizzy, featherbrained, flighty, frivolous, frothy, futile, goofy, harebrained, light-headed, light-minded, puerile, scatterbrained, silly, yeasty Related Words fatuous, foolish, inane, nonsensical, thoughtless, witless; crazy, daffy, daft, fruity; exuberant, flippant, fluttery, giggly, happy, light, lighthearted, playful; sappy, shallow, superficial Near Antonyms grave, melancholy, somber (or sombre), thoughtful; dignified, heavy, no-nonsense, sedate, severe, solemn, staid Antonyms earnest, serious, serious-minded, sober, unfrivolous

2 having a feeling of being whirled about and in danger of falling down I love the giddy feeling you get riding roller coasters Synonyms aswoon, dizzy, light-headed, reeling, swimmy, vertiginous, whirling, woozyRelated Words faint, weak; addled, befuddled, confused, dazed, groggyNear Antonyms clearheaded; stable, steady

3 experiencing or marked by overwhelming usually pleasurable emotion he's clearly giddy at the news that his ailing grandfather will be fine Synonyms elated, elevated, enrapt, enraptured, entranced, euphoric, exhilarated, ecstatic, heady, intoxicated, rapt, rapturous, rhapsodic (also rhapsodical)Related Words enchanted, exultant, glorying, jubilant, rejoicing, triumphant; enthusiastic, excited, gung ho, thrilled; blissed-out, blissful, delighted, glad, gratified, happy, joyful, joyous, pleased, satisfied, tickledNear Antonyms blue, brokenhearted, crestfallen, dejected, despondent, disconsolate, disheartened, doleful, down, downcast, downhearted, forlorn, gloomy, glum, hangdog, heartbroken, heartsick, heartsore, inconsolable, joyless, low, low-spirited, melancholy, miserable, mournful, sad, saddened, sorrowful, sorry, unhappy, woebegone, woeful, wretchedAntonyms depressed