Legal Definition of Co-executor: One of two or more people designated to administer someone’s estate; joint executor | Learn about the important role of co-executors in estate administration and how they ensure that the deceased’s wishes are carried out. With their division of responsibilities, checks and balances, and diverse expertise, co-executors can streamline and manage the legal and financial matters efficiently for a more thorough administration of the estate. Discover the benefits of having co-executors and approach the role with professionalism and commitment to fulfill the deceased person’s wishes