Definition of nadir noun from the Oxford Advanced American Dictionary

 

nadir

 noun
noun
NAmE//ˈneɪdər//
 
, NAmE//ˈneɪdɪr//
 
[singular](formal)
 
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the worst moment of a particular situation the nadir of his career Company losses reached their nadir in 2009. opposite zenith
See the Oxford Advanced Learner's Dictionary entry: nadir