Although other individuals may be called "First Lady" or "First Gentlemen", none are official positions. In contrast, the First Lady of the United States heads an office
By definition, the First Lady is "the wife or hostess of the chief executive of a country or jurisdiction." The term was first used to describe the first-first lady, Martha Washington, and her responsibilities were typically seeing to the comfort of visiting politicians and dignitaries. Even though the title of "First Lady" is an optional one—meaning Michelle Obama could have called herself Boss Woman, First Mate, or DJ fLoTuS. However, no woman who has held the unofficial position has broken with the traditional title.