The Collaborative International Dictionary of English v.0.48:

Deferment \De*fer"ment\, n. [See 1st Defer.]
   The act of delaying; postponement. [R.]
   [1913 Webster]

         My grief, joined with the instant business,
         Begs a deferment.                        --Suckling.
   [1913 Webster]

WordNet (r) 3.0 (2006):

deferment
    n 1: act of putting off to a future time [syn: postponement,
         deferment, deferral]