first lady

/F ER1 S T L EY1 D IY0/
noun
  1. 1

    The wife (or woman of similar rank) of a male chief executive of a nation; especially the wife of the President of a country.

  2. 2

    The wife of a male pastor.

noun
  1. 1

    The leading woman in a specified field of endeavor.

Source: https://en.wiktionary.org/wiki/First%20Lady, https://en.wiktionary.org/wiki/first%20lady