English▸ adjective extraordinary, especially extraordinarily large:
fabulous riches.
▪ informal amazingly good; wonderful:
a fabulous two-week vacation.
▪ having no basis in reality; mythical:
fabulous creatures.
– ORIGIN late Middle English (in the sense ‘known through fable’): from French fabuleux or Latin fabulosus ‘celebrated in fable’, from fabula (see fable).