English

Definition of notional adjective from the Oxford Advanced Learner's Dictionary

 

notional

 adjective
adjective
BrE BrE//ˈnəʊʃənl//
 
; NAmE NAmE//ˈnoʊʃənl//
 
(formal)
 
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based on a guess, estimate or theory; not existing in reality My calculation is based on notional figures, since the actual figures are not yet available. Word Origin late Middle English (in the Latin sense): from obsolete French, or from medieval Latin notionalis ‘relating to an idea’, from notio(n-) ‘idea’, from notus ‘known’, past participle of noscere.
See the Oxford Advanced American Dictionary entry: notional