Retirement is when someone stops working, usually after many years, to take a break or start a new occupation.
In order to consider retirement, a worker must usually have saved enough money to stop working. This most commonly happens after years at a job, and retirement is often a cause of celebration. Sometimes, as in "early retirement," a much younger person is able to stop working for pay — in some cases, because she's become wealthy from a business venture. The Middle French root word is retirer, "to withdraw."