01 a. Feigned, as a story or fable; related in fable; devised; invented; not real; fictitious; as, a fabulous description; a fabulous hero.
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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.
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2.
Beyond belief; exceedingly great; as, a fabulous price.
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3.
Exceptionally good; extremely pleasing.[informal]
Phrases & compounds
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.