The inability to move. Can be used to describe the period after a spinal cord injury, when a person is confined to bed rest and is unable to move around. Alternatively, it could be used to describe the limbs (immobility of the limbs) following paralysis.
Found on http://www.encyclo.co.uk/local/20560
Im`mo·bil'i·ty noun [ Latin immobilitas , from immobilis immovable; prefix im- not + mobilis movable: confer French immobilité . See Mobile .] The condition or quality of being immobile; fixedness in place or state. Found on http://www.encyclo.co.uk/webster/I/14