meridian

Adjective
  1. Of or happening at noon (synset 302877465)
    "meridian hour"
  2. Being at the best stage of development (synset 301492920)
    "our manhood's prime vigor"
    similar to: mature - having reached full natural growth or development
    same as: prime
Noun
  1. The highest level or degree attainable;
    The highest stage of development (synset 113963489)
    "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"
    is a type of: degree, level, point, stage - a specific identifiable position in a continuum or series or especially in a process
    same as: acme, elevation, height, peak, pinnacle, summit, superlative, tiptop, top
  2. A town in eastern Mississippi (synset 109127772)
    is an instance of: town - an urban area with a fixed boundary that is smaller than a city
    is a part of: magnolia state, miss., mississippi, ms - a state in the Deep South on the gulf of Mexico; one of the Confederate States during the American Civil War
  3. An imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator (synset 108616379)
    "all points on the same meridian have the same longitude"
    is a type of: great circle - a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center
    subtypes:
    • observer's meridian - a meridian that passes through the observer's zenith
    • prime meridian - meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England)
    • magnetic meridian - an imaginary line passing through both magnetic poles of the Earth
    specific instances: date line, dateline, international date line - an imaginary line on the surface of the earth following (approximately) the 180th meridian
    same as: line of longitude

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