Giddy

1. v. t. To make dizzy or unsteady.
2. superl. Having in the head a sensation of whirling or reeling about; having lost the power of preserving the balance of the body, and therefore wavering and inclined to fall; lightheaded; dizzy.
3. superl. Promoting or inducing giddiness; as, a giddy height; a giddy precipice.
4. superl. Bewildering on account of rapid turning; running round with celerity; gyratory; whirling.
5. superl. Characterized by inconstancy; unstable; changeable; fickle; wild; thoughtless; heedless.
6. v. i. To reel; to whirl.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.