Source : Webster's Revised Unabridged Dictionary (1913)

Immobilize \Im*mob"i*lize\, v. t. [Pref. im- in + mobilize; cf.
   f. immobiliser.]
   To make immovable; in surgery, to make immovable (a naturally
   mobile part, as a joint) by the use of splints, or stiffened
   bandages.

Source : WordNet®

immobilize
     v 1: hold as reserve or withdraw from circulation; of capital
          [syn: {immobilise}]
     2: to hold fast or prevent from moving; "The child was pinned
        under the fallen tree" [syn: {trap}, {pin}, {immobilise}]
     3: make defenseless [syn: {immobilise}]
     4: convert (assets) into fixed capital [syn: {immobilise}]
     5: prohibit the conversion or use of (assets); "Blocked funds";
        "Freeze the assets of this hostile government" [syn: {freeze},
         {block}, {immobilise}] [ant: {unblock}, {unblock}]
     6: cause to be unable to move; "The sudden storm immobilized
        the traffic" [syn: {immobilise}]