noun
1. a reeling sensation; a feeling that you are about to fall
• Derivationally related forms: ↑vertiginous (for: ↑vertigo), ↑lightheaded, ↑giddy (for: ↑giddiness), ↑dizzy (for: ↑dizziness)
• Hypernyms: ↑symptom
2. a frivolous lack of prudence
• Derivationally related forms: ↑lightheaded
• Hypernyms: ↑heedlessness, ↑mindlessness, ↑rashness
Useful english dictionary. 2012.