DuckCorp Dico

Found 2 definitions

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   ICBM \ICBM\ n. [acronym intercontinental ballistic missile]
      An intercontinental ballistic missile, a long-range ballistic
      missile that is capable of traveling from one continent to
      another. Contrasted with IRBM.
      Syn: intercontinental ballistic missile.
           [WordNet 1.5]
   
                   
                 

2.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   ballistic missile \bal*lis"tic mis`sile\, n.
      A rocket-propelled missile of long range which is guided only
      during the powered portion of its flight, which usually takes
      only a small part of the total flight time; -- contrasted
      with guided missile.
      Note: Ballistic missiles are sometimes referred to by their
            range, such as an
      intercontinental ballistic missile (ICBM) or an
      intermediate range ballistic missile (IRBM).
         [PJC]