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English definition of “spec”

spec

noun uk   /spek/ informal us  
[C] informal for specification: We've had a spec drawn up for a new bathroom.Elaborating, specifying and simplifying
on spec taking a chance, without being sure that you will get what you want: We just turned up at the airport on spec, hoping that we'd get tickets. You could always send your CV to a few companies on spec.UncertaintyHesitatingAchievable
(Definition of spec from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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