an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator; "all points on the same meridian have the same longitude"南極と北極を通り、赤道と直角に交わる、地表の想像上の大円経線
例:all points on the same meridian have the same longitude 同じ子午線上の点はすべて同じ経度である
a town in eastern Mississippiミシシッピ東部の都市メリディアン
the highest level or degree attainable; the highest stage of development; "his landscapes were deemed the acme of beauty"; "the artist's gifts are at their acme"; "at the height of her career"; "the peak of perfection"; "summer was at its peak"; "...catapulted Einstein to the pinnacle of fame"; "the summit of his ambition"; "so many highest superlatives achieved by man"; "at the top of his profession"到達可能な最も高いレベルまたは等級頂点