The Collaborative International Dictionary of English v.0.48:

Procrastinate \Pro*cras"ti*nate\, v. t. [imp. & p. p.
   Procrastinated; p. pr. & vb. n. Procrastinating.] [L.
   procrastinatus, p. p. of procrastinare to procrastinate; pro
   forward + crastinus of to-morrow, fr. cras to-morrow.]
   To put off till to-morrow, or from day to day; to defer; to
   postpone; to delay; as, to procrastinate repentance. --Dr. H.
   More.
   [1913 Webster]

         Hopeless and helpless Aegeon wend,
         But to procrastinate his lifeless end.   --Shak.
   [1913 Webster]

   Syn: To postpone; adjourn; defer; delay; retard; protract;
        prolong.
        [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "procrastinating":
   Micawberish, backward, contemplative, culpably negligent, dallying,
   delaying, derelict, dilatory, dillydallying, do-nothing, dormant,
   easygoing, foot-dragging, idle, immobile, inactive, inadvertent,
   inattentive, inert, lackadaisical, laggard, lagging, laissez-aller,
   laissez-faire, lax, lazy, lingering, loitering, loose, meditative,
   motionless, neglectful, neglecting, negligent, neuter, neutral,
   noninterfering, nonrestrictive, off-guard, overly permissive,
   paralytic, paralyzed, passive, permissive, procrastinative,
   procrastinatory, quiescent, quietist, quietistic, relaxed, remiss,
   scamping, shuffling, skimping, slack, slighting, slow, sluggish,
   slurring, stagnant, stagnating, standpat, static, stationary,
   uncircumspect, unguarded, unrigorous, unwary, unwatchful,
   vegetable, vegetative