1. Expect to be true; believe
   "looking at the clouds, I suppose it will rain soon";
   - think, opine, imagine, reckon, guess, dare say [informal], daresay [informal]
    
2. To believe especially on uncertain or tentative grounds
   "Scientists supposed that large dinosaurs lived in swamps";
   - speculate, theorize, theorise [Brit], conjecture, hypothesize, hypothesise [Brit], hypothecate
    
3. Express a supposition
   "I suppose you'll be leaving soon";
   - say
    
4. Take for granted or as a given; expect beforehand
   "I suppose that you have done your work";
   - presuppose
    
5. (logic) require as a necessary antecedent or precondition
   "This theorem supposes the existence of infinite sets";
   - presuppose

Derived forms: supposed, supposes, supposing

Type of: anticipate, assume, expect, imply, muse, presume, speculate, take for granted

Encyclopedia: Suppose