NO'TIONAL, adjective 1. Imaginary; ideal; existing in idea only; visionary; fantastical. Notional good, by fancy only made. A notional and imaginary thing. 2. Dealing in imaginary things; whimsical; fanciful; as a notional man.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI