From the Free Dictionary by Farlex, for SUPPOSE
1. to assume (something), as for the sake of argument: Suppose you won a million dollars in the lottery.
2. to consider (something) as a possibility or plan: Suppose we wait until tomorrow.
3. to believe or assume as true; take for granted.
4. to think or hold as an opinion: What do you suppose he will do?
5. to require logically; imply; presuppose.
6. (used in the passive) to expect or require (fol. by an infinitive verb): The machine is not supposed to make noise. She was supposed to meet me here.
7. to assume something; presume; think.
[1275–1325; Middle English < Old French supposer=sup- sup- + poser to pose1; compare Medieval Latin suppōnere to suppose, Latin: to substitute, place below]