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English definition of “fifth”

fifth

ordinal number uk   /fɪfθ/ us  
A2 5th written as a word: the fifth floor of the building Tomorrow is the fifth (of September). I was/came fifth in the race.

fifth

noun [C] uk   /fɪfθ/ us  
B1 one of five equal parts of something: One fifth is the same as 20 percent.
(Definition of fifth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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