WordReference Random House Learner's Dictionary of American English © 2017
pos•tu•late /v. ˈpɑstʃəˌleɪt; n. -lɪt, -ˌleɪt/USA pronunciation   v.,  -lat•ed, -lat•ing, n. 
v. 
  1. to suggest or assume the existence or truth of (something), esp. as a basis for further reasoning: [+ object]She postulated an increase in population and went on from there to form a theory of population change.[+ that clause]began by postulating that good and evil exist in all people.

n. [countable]
  1. something assumed to be true and used as a basis for reasoning:a postulate that human beings were created for a purpose.
pos•tu•la•tion /ˌpɑstʃəˈleɪʃən/USA pronunciation  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2017
pos•tu•late  (v. poschə lāt′;n. poschə lit, -lāt′),USA pronunciation v.,  -lat•ed, -lat•ing, n. 
v.t. 
  1. to ask, demand, or claim.
  2. to claim or assume the existence or truth of, esp. as a basis for reasoning or arguing.
  3. to assume without proof, or as self-evident;
    take for granted.
  4. Mathematics, Philosophyto assume as a postulate.

n. 
  1. something taken as self-evident or assumed without proof as a basis for reasoning.
  2. Mathematics, Philosophya proposition that requires no proof, being self-evident, or that is for a specific purpose assumed true, and that is used in the proof of other propositions;
    axiom.
  3. a fundamental principle.
  4. a necessary condition;
    prerequisite.
pos′tu•lation, n. 
pos′tu•lation•al, adj. 
  • Latin postulātum petition, thing requested, noun, nominal use of neuter of past participle of postulāre to request, demand, akin to pōscere to request
  • 1525–35
    • 3.See corresponding entry in Unabridged hypothecate, presuppose, conjecture.
    • 5.See corresponding entry in Unabridged hypothesis, theory;
      axiom;
      assumption, conjecture.

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