gid•dyPronunciation: (gid'ē), [key]
—adj., -di•er, -di•est,
—v., -died, -dy•ing.
affected with vertigo; dizzy.
attended with or causing dizziness: a giddy climb.
frivolous and lighthearted; impulsive; flighty: a giddy young person.
to make or become giddy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.