General Science

  • noun the rewriting of a mathematical function as a series of terms

Cars & Driving

  • noun the increase in volume of a liquid or a gas



  • The increase in dimensions or volume of a body or material caused by thermal variations, moisture, or other environmental conditions. See also expansion bend.


  • economic expansion
  • abbreviation forEconomic expansion
  • The upward phase of the business cycle, in which GDP is rising and unemployment may be falling over time.


  • An increase in extent, size, volume, quantity, number, or scope. Also, the extent of such an increase.
  • The restoration of the space and/or bandwidth of data after compression.
  • The increase of the volume range of an audiofrequency signal, to reverse the effect of volume compression.
  • The restoration of the gain of a signal, so that so that the higher magnitude levels have a higher effective gain than the lower magnitude levels, reversing the effects of compression.
  • In communications, a circuit with more outputs than inputs.