ETYM French méridien, Latin meridianus pertaining to noon, from meridies noon, midday, for older medidies; medius mid, middle + dies day. Related to Mid, and Diurnal.
Of or happening at noon.

ETYM French méridien. Related to Meridian.
Highest point; Geography, circle passing through both poles and any given place.
Half a great circle drawn on the Earth's surface passing through both poles and thus through all places with the same longitude. Terrestrial longitudes are usually measured from the Greenwich Meridian.
An astronomical meridian is a great circle passing through the celestial pole and the zenith (the point immediately overhead).
An imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator; SYN. longitude, line of longitude.

1. City in Idaho (USA); zip code 83642.
2. City in Mississippi (USA).
3. City in Texas (USA); zip code 76665.
4. Town in Oklahoma (USA); zip code 73058.
5. Unincorporated community in Oklahoma (USA).
6. Unincorporated community in Pennsylvania (USA).
7. Village in New York (USA).