pertaining to, of the nature of, or involving a myth.

dealt with in myth, as a prehistoric period.

dealing with myths, as writing.

existing only in myth, as a person.

without foundation in fact; imaginary; fictitious

The explanation was entirely mythical.

adjective

allegorical , chimerical , created , fabled , fabricated , fabulous , fairy-tale , false , fanciful , fantasy , fictitious , fictive , folkloric , imaginary , invented , legendary , made-up , mythic , mythological , nonexistent , pretended , storied , supposititious , traditional , unreal , untrue , visionary , whimsical , mythologic