Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.

Definition of Nonagenarian

Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026

Nonagenarian: Someone in his or her ninties, that is, between 90 and 99 years of age. See also: Age by decade.