1. (noun) an extreme state of adversity; the lowest point of anything

• low-water mark

1. (noun) an extreme state of adversity; the lowest point of anything

• adversity
• hard knocks
• hardship

2. (noun) the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected

• celestial point

1. (noun) the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected

• zenith