|nadir [ NEY-der, NEY-deer ]|
|[ noun ]|
|1. the lowest possible point; extreme despair or adversity|
2. the point on the celestial sphere directly beneath a given position or observer and diametrically opposite the zenith.
|USAGE EXAMPLE 1 :|
|Relations between Iran and the USA reached their nadir when 66 US diplomats were taken hostage by Islamic militants in 1979.|