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Expansion may refer to:

Arts, entertainment and media[edit]

Science, technology, and mathematics[edit]

  • Expansion (geometry), stretching of geometric objects with flat sides
  • Expansion (model theory), in mathematical logic, a mutual converse of a reduct
  • Expansion card, in computing, a printed circuit board that can be inserted into an expansion slot
  • Expansion chamber, on a two-stroke engine, a tuned exhaust system that enhances power output
  • Expansion joint, an assembly that absorbs heat-induced expansion and contraction of construction materials
  • Joule–Thomson effect or Joule–Thomson expansion, the decrease in temperature of a gas when it expands
  • Thermal expansion, the tendency of matter to change in shape, area, and volume in response to a change in temperature
  • Expansion of the universe, the increase of the distance between two distant parts of the universe with time



Other uses[edit]

See also[edit]