The whole duration of a being, whether animal, plant, or other kind, being alive.

The number of full years, months, days, hours, etc., that someone, or something, has been alive.

One of the stages of life.

“the age of infancy”

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.”