zenith zenith /ˈziːnɪθ/

noun

1. () The point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected  ( zenith )
   the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
    At noon, the sun was almost at its zenith.
   At noon, the sun was almost at its zenith.