noun:the length of time that a person has lived or a thing has existed
At the age of thirty, he decided to change careers.
noun:a distinct period of history characterized by particular developments or features
The Bronze Age saw the widespread use of metal tools.
noun:the process of becoming older; the condition of growing old
The wine's age contributes to its rich flavor.
verb:to become older or to cause something to become older
He aged gracefully, gaining wisdom with each passing year.