notionally

adjective

1. of, expressing, or consisting of notions, or concepts
2. imaginary; not actual to inhabit a notional world
3. ☆ having visionary ideas; given to whims; fanciful
4. Gram. having full lexical, as distinguished from relational, meaning “have” is notional in “we have a problem” and relational in “we have solved a problem”

Etymology: ML notionalis