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English definition of “failing”

failing

noun [C] uk   /ˈfeɪ.lɪŋ/ us  
a fault or weakness: His one big failing is that he never says he's sorry.Faults and mistakesWeakness and vulnerability

failing

preposition uk   /ˈfeɪ.lɪŋ/ us  
if that is not possible: Give her a book, or failing that, buy her something to wear. Appointments are available on the 2nd and the 6th of this month but failing either of those, we could fit you in on the 15th.Impossible and improbable

failing

adjective uk   /ˈfeɪ.lɪŋ/ us  
becoming weaker or less successful: a failing business failing eyesight In the failing light, it was hard to read the signposts.Becoming and making less strong
(Definition of failing from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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