zenith

noun (n)

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

   Antonim: nadir

   Sumber: wordnet30

2. That point in the visible celestial hemisphere which is vertical to the spectator; the point of the heavens directly overhead; -- opposed to nadir. (noun)

   Sumber: webster1913