To cause to grow old; to impart the characteristics of age to.

"Grief ages us."

To postpone an action that would extinguish something, as a debt.

"Money's a little tight right now, let's age our bills for a week or so."

To categorize by age.

"One his first assignments was to age the accounts receivable."

To grow aged; to become old; to show marks of age.

"He grew fat as he aged."

The process of becoming older or more mature.

The deliberate process of making something (such as an antique) appear (or, in science fiction, become) older than it is.

Becoming senescent; accumulating damage to macromolecules, cells, tissues and organs with the passage of time; progressing loss of health, mobility, vibrancy and body functionality, resulting in biological death.

Wear, wear and tear.

Becoming elderly.

"The aging artist could no longer steadily hold the brush."