The process of becoming older, especially in terms of human beings, characterized by a gradual decline in physical and sometimes mental capabilities. Aging is a natural part of life that everyone experiences.
The process of maturing or developing over time, often used in reference to wine, cheese, or other consumables that improve with time. The aging of the cheese in the cellar gave it a rich and complex flavor.
The appearance or characteristics of being old or older. The aging of the building was evident in its crumbling facade and faded paint.
A gradual change in the physical or mechanical properties of a material (such as a metal or polymer) over time or as a result of heat treatment. Solution-treated aluminum alloys require aging at elevated temperatures to achieve maximum hardness.