apex - definition, thesaurus and related words from WordNet-Online

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Noun apex has 2 senses

vertex, peak, apex, acme - the highest point (of something); "at the peak of the pyramid"
--₁ is a kind of extreme point, extreme, extremum
--₁ has particulars: crown; roof peak
apex, solar apex, apex of the sun's way - the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars
--₂ is a kind of celestial point
--₂ is a part of
celestial sphere, sphere, empyrean, firmament, heavens, vault of heaven, welkin
Antonyms: antapex