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.
- Having a reeling, lightheaded sensation; dizzy.
- Causing or capable of causing dizziness: a giddy climb to the topmast.
- Frivolous and lighthearted; flighty.
- To become or make giddy.