aging

American  

[ey-jing] / ˈeɪ dʒɪŋ /

Or ageing

noun

1. the process of becoming old or older.

   The aging of the population has had an effect on state revenues.

2. the process of bringing a product, material, etc., to maturity or a state fit for use.

   the proper aging of cheese in controlled conditions of temperature and humidity.

3. the process of making something seem older than it is.

   The leather tabletop is a recent replacement with deliberate aging and antiquing.

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adjective

1. becoming old or older; showing signs of growing old.

   Many of us are caring for an aging parent in declining health.

2. giving the appearance of being old or older.

   They used aging makeup on some of the actors instead of recasting the roles.

Etymology

Origin of aging

First recorded in 1400–50; late Middle English; age ( def. ) + -ing ¹ ( def. ) for the noun; age ( def. ) + -ing ² ( def. ) for the adjective

Example Sentences

Researchers continuously monitored dozens of short-lived fish throughout their lives to better understand how behavior connects to aging.

From Science Daily

A near record-low U.S. birthrate and an aging population also brake U.S. population growth.

From The Wall Street Journal

At the dawn of the 2025 season, we published a column with the headline, “What’s the future for aging Angel Stadium? It feels like an increasingly uncertain one.”

From Los Angeles Times

Lena Ting of Emory University and her team set out to understand how aging and Parkinson's disease affect the way the brain and muscles respond when a person tries to regain balance.

From Science Daily

The country aims to reverse military attrition, recruiting 2,500 personnel in the coming years, while upgrading aging bases and equipment.

From The Wall Street Journal