(n.) = developed country ; developed nation ; advanced economy ; first-world nation ; first world country. Ex: The gap between the archivally developed and undeveloped countries has widened since 1979 and technical changes relating to automation, conservation, reprography, deterioration due to pollution and wear and tear cause increasing problems. Ex: Technology transfers between developed and underdeveloped nations have been the mainstays of economic development for over 30 years. Ex: The author looks at the likely future shifts in economic structures in advanced economies, as the information age replaces the industrial era, and regionalism gathers pace. Ex: But the real challenge to get it started is first to find the measures that can assuage the fear of the first-world nations. Ex: Many first world countries have by law 3-4 weeks of vacation per year, minimum.