The process by which the median age of a population increases due to declining birth rates and/or rising life expectancy.

जनसंख्या की बढ़ती उम्र

English Usage: The aging of population is a significant issue for many developed countries.

Hindi Usage: विकसित देशों के लिए जनसंख्या की वृद्धावस्था एक महत्वपूर्ण मुद्दा है।