The Collaborative International Dictionary of English v.0.48:

Immovable \Im*mov"a*ble\, a.
   1. Incapable of being moved; firmly fixed; fast; -- used of
      material things; as, an immovable foundation.
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            Immovable, infixed, and frozen round. --Milton.
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   2. Steadfast; fixed; unalterable; unchangeable; -- used of
      the mind or will; as, an immovable purpose, or a man who
      remains immovable.
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   3. Not capable of being affected or moved in feeling or by
      sympathy; unimpressible; impassive. --Dryden.
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   4. (Law.) Not liable to be removed; permanent in place or
      tenure; fixed; as, an immovable estate. See Immovable,
      n. --Blackstone.
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   Immovable apparatus (Med.), an appliance, like the plaster
      of paris bandage, which keeps fractured parts firmly in
      place.

   Immovable feasts (Eccl.), feasts which occur on a certain
      day of the year and do not depend on the date of Easter;
      as, Christmas, the Epiphany, etc.
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