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Nadir
01
the moment in which a situation or life is at its lowest or worst
Examples
After losing his job and his home, he felt he had reached the nadir of his life.
The company 's profits hit their nadir during the financial crisis.
02
the point on the celestial sphere directly beneath an observer, exactly opposite the zenith
Examples
At local midnight on the equinox, the sun stands at its nadir—90 ° below the horizon.
The satellite 's camera was configured for nadir viewing to capture vertical ground imagery.
