meridian

• 指与最高点、巅峰或全盛时期相关的；在地理学和天文学中，指地球或天球上的大圆（子午圈），也指正午的。

Relating to the highest point or peak of development, success, or power; also used in geography and astronomy to describe a great circle on the earth's or celestial sphere.

1. Relating to noonC1formal

   Of or occurring at midday or noon.

   正午的

   • The meridian sun cast short shadows on the ground.
   • They took a break during the meridian heat.
   • The meridian hour is often the warmest part of the day.

   同义词middaynoonnoonday

   反义词midnight

2. At the peak of developmentC2formal

   Being at the highest or most advanced stage of development, vigor, or excellence.

   鼎盛时期

   • The artist was in his meridian years, producing his finest work.
   • The civilization reached its meridian period of cultural achievement.
   • Her meridian career was marked by groundbreaking discoveries.

   同义词climacticpeakprimesupremezenithal

   反义词incipientnascentprimitiverudimentaryundevelopedwaning

• 名词，指地球表面从北极到南极的假想大圆（经线），也指事物发展的最高点、顶点或全盛时期。

A noun referring either to the highest point or stage of development, or to an imaginary great circle on Earth's surface running from pole to pole.

1. Peak or highest pointC1formal

   The highest level or degree attainable; the zenith or climax of development.

   顶点

   • The artist reached the meridian of his career with that masterpiece.
   • At the meridian of her power, she ruled with unmatched influence.
   • The empire was at its meridian when it expanded across three continents.

   同义词acmeapexapogeeclimaxculminationheightpeakpinnaclesummitzenith

   反义词bottomnadirtrough

2. Geographic lineB2formal

   An imaginary great circle on the Earth's surface passing through the North and South Poles, used for measuring longitude.

   子午线

   • The Prime Meridian passes through Greenwich, England.
   • Each meridian is a line of constant longitude.
   • The ship's captain calculated their position using the meridian.

   同义词line of longitude