Entry Word: giddy

Function: adjective

Meaning: 1 lacking in seriousness or maturity <the giddy youngsters continued to laugh, joke, and make faces during the ceremonies>

Synonyms featherbrained, flighty, frivolous, goofy, harebrained, light-headed, puerile, scatterbrained, silly

Related Words fatuous, foolish, inane, nonsensical, thoughtless, witless; crazy, daffy, daft, exuberant, flippant, fluttery, 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

2 having a feeling of being whirled about and in danger of falling down <I love the giddy feeling you get riding roller coasters> — see dizzy 1