existing only in the mind; imaginary or conceptual

theoretical or speculative

a notional profit for the coming year

said of a word: having an actual meaning in a sentence rather than a mere grammatical function

‘Has’ is notional in ‘he has luck’, relational in ‘he has gone’

in language teaching, denoting a syllabus aimed at developing effective communication

chiefly NAmer given to fanciful moods or ideas