Noah Webster
Giddiness
GID'DINESS, noun The state of being giddy or vertiginous; vertigo; a sensation of reeling or whirling, when the body loses the power of preserving its balance or a steady attitude, or when objects at rest appear to reel, tremble or whirl; a swimming of the head.
1. Inconstancy; unsteadiness; mutability.
2. Frolic; wantonness; levity.