Enlargement may refer to:

• the growth in membership of political entities:
  • Enlargement of the European Union is the political process for integrating countries into the European Union.
  • Enlargement of the African Union
  • Enlargement of the Arab League
  • Enlargement of the United Nations
  • Enlargement of NATO
  • Enlargement of Switzerland
  • Enlargement of the European Space Agency
• in other contexts:
  • In mathematics, an enlargement is a uniform scaling, an example of a Homothetic transformation that increases distances, areas and volumes.
  • Enlargement (in fiction) is a theme in fiction, especially in science fiction and fantasy.
  • An enlargement is a photographic print that is larger than the negative it is printed from, through the use of an enlarger.
  • Penis enlargement.

• Expansion (disambiguation)