Definition of premise noun from the Oxford Advanced Learner's Dictionary

 

premise

 noun
(also British English, less frequent premiss)noun
BrE BrE//ˈpremɪs//
 
; NAmE NAmE//ˈpremɪs//
 
(formal)
 
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a statement or an idea that forms the basis for a reasonable line of argument the basic premise of her argument a false premise His reasoning is based on the premise that all people are equally capable of good and evil. Word Origin late Middle English: from Old French premisse, from medieval Latin praemissa (propositio) ‘(proposition) set in front’, from Latin praemittere, from prae ‘before’ + mittere ‘send’.Extra examples The argument rests on a false premise. The basic premise of this argument is deeply flawed. The premise on which they worked was that there would always be enough natural resources to support them.
See the Oxford Advanced American Dictionary entry: premise