A comfortable retirement refers to a state in which an individual has enough financial resources and income-producing assets to maintain their desired standard of living during their retired years. This typically involves having saved enough money through various means such as pensions, 401(k) plans, IRAs or other savings accounts, so that they can live without worrying about running out of funds in the future. A comfortable retirement also includes factors like good health, social security benefits and a fulfilling lifestyle that brings happiness and contentment to an individual's later years.