'Immobile' definitions:

Definition of 'immobile'

From: WordNet
adjective
Not capable of movement or of being moved [ant: mobile]
adjective
Securely fixed in place; "the post was still firm after being hit by the car" [syn: fast, firm, immobile]

Definition of 'Immobile'

From: GCIDE
  • Immobile \Im*mo"bile\, a. [L. immobilis: cf. F. immobile. See Immobility.] Incapable of being moved; immovable; fixed; stable. --Prof. Shedd. [1913 Webster] immobilisation