zenith
Cross references: 1. summit ze.nith \'ze--n*th, esp Brit 'zen-ith\ n [ME senith, fr. MF cenith, fr. ML, fr. OSp zenit, modif. of A]r samt (ar-ra's) way (of the head) 1: the point of the celestial sphere that is directly opposite the nadir an d vertically above the observer 2: the highest point reached in the heavens by a celestial body 3: culminating point : ACME