WordWeb Online

1. Take for granted or as a given; expect beforehand
   "I presuppose that you have done your work";
   - suppose
    
2. (logic) require as a necessary antecedent or precondition
   "This step presupposes two prior ones";
   - suppose

Derived forms: presupposed, presupposes, presupposing

Type of: assume, imply, presume, take for granted

Encyclopedia: Presuppose