D defs.my
Entry 3 senses Webster, 1913

Notional

/nōsh'-ən-əl/ · No·tion·al · IPA /ˈnoʊʃənəl/
01 a. Consisting of, or conveying, notions or ideas; expressing abstract conceptions.
  1. 1.
    Consisting of, or conveying, notions or ideas; expressing abstract conceptions.
  2. 2.
    Existing in idea only; visionary; whimsical.
    “Discourses of speculative and notional things.” Evelyn.
  3. 3.
    Given to foolish or visionary expectations; whimsical; fanciful; as, a notional man.