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English definition of “fab”

fab

adjective uk   /fæb/ us  
informal for fabulous: I bought some fab jeans on Saturday.Informal words for goodGood, better and bestQuite good, or not very good

fab

noun [C] uk   /fæb/ (also fab plant) us  
a factory for making advanced electronic products, for example silicon chips: two major semiconductor fabsFactories
(Definition of fab from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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