Definitions of suppose:

• verb:   express a supposition
• verb:   require as a necessary antecedent or precondition

  Example: "This step presupposes two prior ones"

• verb:   take for granted or as a given; suppose beforehand

  Example: "I presuppose that you have done your work"

• verb:   expect, believe, or suppose
• verb:   to believe especially on uncertain or tentative grounds

  Example: "Scientists supposed that large dinosaurs lived in swamps"