fabulousa.[L. fabulosus; cf. F. fabuleux. See Fable.]1. Feigned, as a story or fable; related in fable; devised; invented; not real; fictitious; as, a fabulous description; a fabulous hero.()The fabulous birth of Minerva. (Chesterfield.)2. beyond belief; exceedingly great; as, a fabulous price.(Macaulay.)Fabulous age, that period in the history of a nation of which the only accounts are myths and unverified legends; as, the fabulous age of Greece and Rome.()()