Gid″dy (?), a. [Compar.Giddier (?); superl.Giddiest.] [OE. gidi mad, silly, AS. gidig, of unknown origin, cf. Norw. gidda to shake, tremble.]
1. 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.
By giddy head and staggering legs betrayed. Tate.
2. Promoting or inducing giddiness; as, a giddy height; a giddy precipice. Prior.
Upon the giddy footing of the hatches. Shak.
3. Bewildering on account of rapid turning; running round with celerity; gyratory; whirling.
The giddy motion of the whirling mill. Pope.
4. Characterized by inconstancy; unstable; changeable; fickle; wild; thoughtless; heedless. “Giddy, foolish hours.” Rowe. “Giddy chance.” Dryden.
Young heads are giddy and young hearts are warm. Cowper.