say it: ZEE-nuhth
zenith is a noun meaning "the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected". It carries one recorded sense.
the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for zenith come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.