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"

Moby Thesaurus II by Grady Ward, 1.0:

97 Moby Thesaurus words for "moribund":
   apathetic, bad, benumbed, blase, bored, cachectic, dead,
   debilitated, decadent, declining, despaired of, deteriorating,
   done for, dopey, dormant, drained, droopy, drugged, dull, dying,
   ending, enervated, exanimate, exhausted, expiring, facing death,
   fading, failing, feeble, frail, given up, going, healthless, heavy,
   hebetudinous, hopeless, in articulo mortis, in extremis,
   in poor health, inanimate, incapable of life, inert, infirm,
   invalid, jaded, lackadaisical, languid, languishing, languorous,
   leaden, lethargic, lifeless, listless, low, lumpish, near death,
   nonviable, numb, obsolescent, on the wane, pale, peaked, peaky,
   phlegmatic, pooped, reduced, reduced in health, run-down, sated,
   sickly, sinking, sleepy, slipping, slipping away, slow, sluggish,
   somnolent, stagnant, stagnating, stultified, supine, terminal,
   torpid, unhealthy, unsound, valetudinarian, valetudinary,
   vegetable, vegetative, wan, waning, weak, weakened, weakly, weary,
   with low resistance, world-weary