The Collaborative International Dictionary of English v.0.48:

Moribund \Mor"i*bund\, a. [L. moribundus, from moriri to die.
   See Mortal.]
   In a dying state; dying; at the point of death.
   [1913 Webster]

         The patient was comatose and moribund.   --Copland.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Moribund \Mor"i*bund\, n.
   A dying person. [R.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

moribund
    adj 1: not growing or changing; without force or vitality [syn:
           stagnant, moribund]
    2: being on the point of death; breathing your last; "a moribund
       patient"