Noah Webster's New International Dictionary of the English Language

1. (a.) Incapable of being moved; firmly fixed; steadfast; as, an immovable foundation.

2. (a.) Steadfast; fixed; unalterable; unchangeable; -- used of the mind or will; as, an immovable purpose, or a man who remain immovable.

3. (a.) Not capable of being affected or moved in feeling or by sympathy; unimpressible; impassive.

4. (a.) Not liable to be removed; permanent in place or tenure; fixed; as, an immovable estate. See Immovable, n.

5. (n.) That which can not be moved.

6. (n.) Lands and things adherent thereto by nature, as trees; by the hand of man, as buildings and their accessories; by their destination, as seeds, plants, manure, etc.; or by the objects to which they are applied, as servitudes.