noun na·dir \ˈnā-ˌdir, ˈnā-dər\

: the worst or lowest point of something

Full Definition of NADIR

:  the point of the celestial sphere that is directly opposite the zenith and vertically downward from the observer
:  the lowest point

Examples of NADIR

  1. The relationship between the two countries reached a nadir in the 1920s.
  2. <the discussion really reached its nadir when people resorted to name-calling>
  3. Nantucket reached its nadir in the post-Civil War period. The whaling industry had become moribund, many New Englanders had been lured to California by the discovery of gold, and the island population dropped from ten thousand in 1830 to scarcely more than three thousand in 1880. —David H. Wood, Antiques, August 1995

Illustration of NADIR

Origin of NADIR

Middle English, from Middle French, from Arabic naḍhīr opposite
First Known Use: 15th century

Other Astronomy Terms

gibbous, nebulous, penumbra, retrograde, sidereal, syzygy, wane, wax, zenith


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