The Collaborative International Dictionary of English v.0.48:

Foreknowledge \Fore*knowl"edge\, n.
   Knowledge of a thing before it happens, or of whatever is to
   happen; prescience.
   [1913 Webster]

         If I foreknew,
         Foreknowledge had no influence on their fault.
                                                  --Milton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

foreknowledge
    n 1: knowledge of an event before it occurs [syn:
         precognition, foreknowledge]

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "foreknowledge":
   apprehension, clairvoyance, command, comprehension, conception,
   conceptualization, decree, foreboding, foredestiny,
   foregone conclusion, foreknowing, foreordination, foreseeability,
   forewisdom, grasp, grip, ideation, intellection, intelligence,
   mastery, mental grasp, necessity, precognition, predestination,
   predetermination, prehension, preordination, presage, prescience,
   presentiment, savvy, understanding, wisdom