noun ze·nith \ˈzē-nəth, Canada also & British usually ˈze-nəth, -nith\

: the strongest or most successful period of time

: the highest point reached in the sky by the sun, moon, etc.

Full Definition of ZENITH

:  the point of the celestial sphere that is directly opposite the nadir and vertically above the observer — see azimuth illustration
:  the highest point reached in the heavens by a celestial body
:  culminating point :  acme <at the zenith of his powers — John Buchan>

Examples of ZENITH

  1. <at the zenith of her career as a dancer>

Origin of ZENITH

Middle English cenyth, senyth, from Middle French cenit, from Medieval Latin, from Old Spanish zenit, modification of Arabic samt (al-ra's) way (over one's head)
First Known Use: 14th century

Other Astronomy Terms

gibbous, nadir, nebulous, penumbra, retrograde, sidereal, syzygy, wane, wax


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May 29, 2015
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