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nadir

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Definition of nadir

noun

[in singular]
  • 1the lowest or most unsuccessful point in a situation:asking that question was the nadir of my career
  • 2 Astronomy the point on the celestial sphere directly below an observer. The opposite of zenith.

Origin:

late Middle English (in nadir (sense 2)): via French from Arabic naẓīr (as-samt) 'opposite (to the zenith)'

nadir in other Oxford dictionaries

Definition of nadir in the US English dictionary
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