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.