notional (adj.)not based on fact; existing only in the imagination; "the falsehood about some fanciful secret treaties"- F.D.Roosevelt;
to create a notional world for oneself
notional (adj.)not based on fact or investigation;
a notional figure of cost helps in determining production costs
notional (adj.)indulging in or influenced by fancy;
all the notional vagaries of childhood
notional (adj.)being of the nature of a notion or concept;
to improve notional comprehension
a notional response to the question
Synonyms: conceptional / ideational