an extreme state of adversity; the lowest point of anything
the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected
The point of the celestial sphere, directly opposite the zenith; inferior pole of the horizon; point of the celestial sphere directly under the place of observation.
To extend (a beehive) by adding an empty box at the base.
A male given name.
The word nadir comes from Medieval Latin and originally the Arabic phrase naẓīr as-samt. This phrase literally means "the counterpart of the zenith."