The Collaborative International Dictionary of English v.0.48:

armoured \armoured\ adj.
   1. provided with protective covering; -- used of animals.
      Opposite of unarmored.

   Note: [Narrower terms: bone-covered ; {scaly, scaley,
         scaled.

   Syn: armored.
        [WordNet 1.5]

   2. same as armor-clad; -- used of persons or things
      military. Opposite of unarmored.

   Note: One that is aromour-clad is bulletproof. Narrower
         terms: lightly armored, lightly armoured; mail-clad,
         mailed; panzer; {scaled

   Syn: armored.
        [WordNet 1.5]