Definition from Wiktionary, the free dictionary
Jump to: navigation, search
See also: Expansion



This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.



expansion ‎(countable and uncountable, plural expansions)

  1. The act or process of expanding.
    The expansion of metals and plastics in response to heat is well understood.
  2. The fractional change in unit length per unit length per unit temperature change.
  3. A new addition.
    My new office is in the expansion behind the main building.
  4. A product to be used with a previous product.
    This expansion requires the original game board.
  5. That which is expanded; expanse; extended surface.
    • Beattie
      the starred expansion of the skies
  6. (steam engines) The operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston.


Related terms[edit]

Derived terms[edit]


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.


French Wikipedia has an article on:

Wikipedia fr


expansion f ‎(plural expansions)

  1. expansion

External links[edit]