macronation noun3 •An internationally recognised country, as opposed to a micronation; a sovereign state, especially a member or observer state of the United Nations.They still worked in the US, but sent a notice of secession to the macronation's government. I remember seeing the article in the "Lifestyle" section of the Times, and it started me to wondering. — 2000 •(rare) A large country; a sovereign state of considerable size, population or both.Excluding microstates with a population of less than one million people there are 29 democratic macronations. — 2007 •(rare) A large nation; a nation of considerable size in population or membership. formsmacronations