aging

or age·ing

[ ey-jing ]
/ ˈeɪ dʒɪŋ /

noun

the process of becoming old or older: The aging of the population has had an effect on state revenues.
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.
the process of making something seem older than it is: The leather tabletop is a recent replacement with deliberate aging and antiquing.

adjective

becoming old or older; showing signs of growing old: Many of us are caring for an aging parent in declining health.
giving the appearance of being old or older: They used aging makeup on some of the actors instead of recasting the roles.

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Origin of aging

First recorded in 1400–50; late Middle English; age + -ing1; for the noun senses; age + -ing2 for the adjective senses
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for aging

Medical definitions for aging

aging
[ ājĭng ]

n.

The process of growing old or maturing.
The gradual changes in the structure of a mature organism that occur normally over time and increase the probability of death.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.