The Collaborative International Dictionary of English v.0.48:

Procrastination \Pro*cras`ti*na"tion\, n. [L. procrastinatio:
   cf. F. procrastination.]
   The act or habit of procrastinating, or putting off to a
   future time; delay; dilatoriness.
   [1913 Webster]

         Procrastination is the thief of time.    --Young.
   [1913 Webster]

WordNet (r) 3.0 (2006):

procrastination
    n 1: the act of procrastinating; putting off or delaying or
         defering an action to a later time [syn: procrastination,
         cunctation, shillyshally]
    2: slowness as a consequence of not getting around to it [syn:
       dilatoriness, procrastination]