The Collaborative International Dictionary
Fabulous \Fab"u*lous\ (f[a^]b"[-u]*l[u^]s), a. [L. fabulosus; cf. F. fabuleux. See Fable.]
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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. -
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. -- Fab"u*lous*ly, adv. -- Fab"u*lous*ness, n.
Wiktionary
n. 1 The state of being fabulous or fictitious; fabulosity. 2 The state of being fabulous or wonderful.
Usage examples of "fabulousness".
I, like most young women, turned to the fabulousness of Diana Ross, Tina Turner, and Sophia Loren.
I know, my complete fifteen-part Manifesto of Fabulousness, my Philosophy of Fabulosity.