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English definition of “flatline”

flatline

verb [I] uk   /ˈflæt.laɪn/ informal us  
to be at a low level and not increase: Have widescreen TV prices finally flatlined? to stop being popular or successful: Her acting career has flatlined. to die
flatlining
noun [U] uk   /-ɪŋ/ us  
The effects of the music industry's flatlining have been felt by retailers.
(Definition of flatline from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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