meridian vs pinnacle

meridian

noun
  • The highest or most developed point, or most splendid stage, of something; culmination, peak, zenith. 

  • A ring or half-ring with markings in which an artificial globe is installed and may spin. 

  • In full celestial meridian: a great circle passing through the poles of the celestial sphere and the zenith for a particular point on the Earth's surface. 

  • A line passing through the poles of any sphere; a notional line on the surface of a curved or round body (in particular, an eyeball). 

  • Any of the pathways on the body along which chi or qi (life force) is thought to flow and, therefore, the acupoints are distributed; especially, one of twelve such pathways associated with organs of the body. 

  • Chiefly followed by of: the middle period of someone's life, when they are at their full abilities or strength; one's prime. 

  • In full terrestrial meridian: a great circle on the Earth's surface, passing through the geographic poles (the terrestrial North Pole and South Pole); also, half of such a circle extending from pole to pole, all points of which have the same longitude. 

  • The place on the celestial meridian where it is crossed by the sun or a star at its highest point. 

verb
  • Of a celestial body: to reach its meridian. 

  • To cause an object to reach the meridian or highest point of (something). 

adj
  • Relating to a meridian (in various senses); meridional. 

  • Relating to midday or noon. 

pinnacle

noun
  • The highest point. 

  • An upright member, generally ending in a small spire, used to finish a buttress, to constitute a part in a proportion, as where pinnacles flank a gable or spire. 

  • Coordinate term: sea stack 

  • A tall, sharp and craggy rock or mountain. 

  • An all-time high; a point of greatest achievement or success. 

verb
  • To place on a pinnacle. 

  • To build or furnish with a pinnacle or pinnacles. 

How often have the words meridian and pinnacle occurred in a corpus of books? (source: Google Ngram Viewer )