Source : Webster's Revised Unabridged Dictionary (1913)

Presuppose \Pre`sup*pose"\, v. t. [imp. & p. p. {Presupposed};
   p. pr. & vb. n. {Presupposing}.] [Pref. pre- + suppose: cf.
   F. pr['e]supposer.]
   To suppose beforehand; to imply as antecedent; to take for
   granted; to assume; as, creation presupposes a creator.

         Each [kind of knowledge] presupposes many necessary
         things learned in other sciences, and known beforehand.
                                                  --Hooker.