expansion

/ɪkˈspænʃən/
noun
  1. The act or process of becoming larger in size, volume, or scope.
    • Scientists study the expansion of the universe to understand its origins.
    • The company announced a major expansion of its factory to meet growing demand.
    • The expansion of the city has led to more traffic and new neighborhoods.
  2. A detailed explanation or elaboration of a topic or idea.
    • The professor asked for an expansion of the student's thesis statement.
    • The speaker gave a brief expansion of the main points from the report.
    • Her essay included an expansion on the economic effects of climate change.
  3. A product or service that adds new features or content to an existing one, especially in software or gaming.
    • The software expansion includes advanced editing features for professionals.
    • The new expansion for the game adds three new characters and a new map.
    • I bought the expansion pack to unlock additional levels and tools.