Gĭd'dy1, a.
a. [compar. GIDDIER; superl. GIDDIEST.] [A-S. gîdig, gydig, gyddig, giddy, dizzy, gydian, gyddian, to be giddy. Cf. A-S. gâd, a point of a weapon, prick, goad.]
Sense 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; light-headed; given to vertigo; dizzy.
By giddy head and staggering legs betrayed. Tate.
Sense 2. Promoting or inducing giddiness; as, a giddy height; a giddy precipice. Prior.
As we paced along Upon the giddy footing of the hatches. Shak.
Sense 3. Bewildering on account of rapidity; whirling; running round with celerity; gyratory.
The giddy motion of the whirling mill. Pope.
Sense 4. Characterized by inconstancy; unstable; tottering; unfixed; changeable. “Giddy chance.” Dryden.
Sense 5. Characterized by heedlessness; wild; thoughtless; excited. “Giddy, foolish hours.” Rowe. “Young heads are giddy.” Cowper.