v.
  
/
ˈpɒstjʊleɪt/
  
- suggest or assume the existence, fact, or truth of (something) as a basis for reasoning, discussion, or belief.
- (in ecclesiastical law) nominate or elect to an ecclesiastical office subject to the sanction of a higher authority.
n.
  
/
ˈpɒstjʊlət/
 a thing postulated.
Derivative
  
    - postulation n.
- postulator n.
 
  Etymology
  ME: from L. postulat-, postulare ‘ask’.