Assume something or present it as a fact and you postulate it. Physicists postulate the existence of parallel universes, which is a little mind-blowing.

Anyone who has suffered through geometry class is familiar with some of the greatest hits, like Euclid's postulate and the point-line-plane postulate. Those are propositions that have to be assumed for other mathematical statements to follow logically. As a verb (pronounced "POST-you-late") it describes the act of presenting an idea, theory, belief, or concept.

Definitions of postulate

v maintain or assert

Type of:
assert or affirm strongly; state to be true or existing

v require as useful, just, or proper

“This intervention does not postulate a patient's consent”
ask, call for, demand, involve, necessitate, need, require, take
claim, exact, take
take as an undesirable consequence of some event or state of affairs
eliminate, obviate, rid of
do away with
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claim, exact, take
take as an undesirable consequence of some event or state of affairs
require to be in a certain grammatical case, voice, or mood
require a specified depth for floating
require to lose, suffer, or sacrifice
cry for, cry out for
need badly or desperately
necessitate or exact

v take as a given; assume as a postulate or axiom

assert, insist
assert to be true
Type of:
presuppose, suppose
take for granted or as a given; suppose beforehand

n (logic) a proposition that is accepted as true in order to provide a basis for logical reasoning

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Bayes' postulate
(statistics) the difficulty of applying Bayes' theorem is that the probabilities of the different causes are seldom known, in which case it may be postulated that they are all equal (sometimes known as postulating the equidistribution of ignorance)
assumption, premise, premiss
a statement that is assumed to be true and from which a conclusion can be drawn
major premise, major premiss
the premise of a syllogism that contains the major term (which is the predicate of the conclusion)
minor premise, minor premiss, subsumption
the premise of a syllogism that contains the minor term (which is the subject of the conclusion)
an unproved statement put forward as a premise in an argument
condition, precondition, stipulation
an assumption on which rests the validity or effect of something else
a postulated sequence of possible events
Type of:
(logic) a statement that affirms or denies something and is either true or false

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