The process of becoming older or more mature.
The accumulation of damage to macromolecules, cells, tissues and organs with the passage of time; the progressing loss of health, mobility, vibrancy and body functionality, resulting in biological death.
The deliberate process of making something (such as an antique) appear (or, in science fiction, become) older than it is.
Wear; wear and tear.
Becoming elderly.
old age