Expander

Expander can refer to:

  • Part of the process of dynamic range compression
  • Part of the process of signal compression
  • Part of the process of companding
  • Turboexpander, a turbine for high-pressure gas
  • Expander graph, a sparse graph used in the combinatorics branch of mathematics
  • StuffIt Expander, a file decompressor software utility
  • "Expander", a song on the album Accelerator by The Future Sound of London
  • Orthodontic expander, a device to widen the upper jaw
  • Disclosure widget, a widget that hides non-essential settings or information, also known as an expander.