• Meridian (astronomy), imaginary circle in a plane perpendicular to the planes of the celestial equator and horizon
  • Central meridian (planets)
• Meridian (geography), an imaginary arc on the Earth's surface from the North Pole to the South Pole
  • Meridian arc, the distance between two points with the same longitude
  • Prime meridian, origin of longitudes
  • Principal meridian, arbitrary meridians used as references in land surveying
• Meridian line, used with a gnomon to measure solar elevation and time of year
• Autonomous sensory meridian response, a static-like or tingling sensation on the skin

Cities and towns

• Meridian, California (disambiguation), U.S., multiple California towns named Meridian
• Meridian, Colorado, U.S.
• Meridian, Florida, U.S.
• Meridian, Georgia, U.S.
• Meridian, Idaho, U.S.
• Meridian, Mississippi, U.S.
• Meridian, Nebraska, U.S.
• Meridian, New York, U.S.
• Meridian, Oklahoma (disambiguation), U.S., multiple Oklahoma towns named Meridian
• Meridian, Pennsylvania, U.S.
• Meridian, Seattle, Washington, U.S.
• Meridian, Texas, U.S.

Townships

• Meridian Township, Clinton County, Illinois, U.S.
• Meridian Charter Township, Michigan, U.S.

Buildings

• Meridian (Amtrak station), or Union Station, Meridian, Mississippi, U.S.
• Meridian Mall, Meridian Township, Michigan, U.S.
• Meridian Mall, Dunedin, New Zealand
• Meridian Hall, listed on the National Register of Historic Places in Washington, D.C., U.S.
• Meridian Manor, listed on the National Register of Historic Places in Washington, D.C., U.S.
• Meridian Mansions, listed on the National Register of Historic Places in Washington, D.C., U.S.

Other places

• Lake Meridian, Kent, Washington, U.S.
• Meridian Creek, a stream in Alaska, U.S.
• Meridian Glacier, Graham Land, Antarctica
• Meridian Peak, Eagles Nest Wilderness, near Vail, Colorado, U.S.
• Meridian Plantation, a quail-hunting plantation in Leon County, Florida, U.S., established in 1915

Print

• Meridian (novel), 1976 novel by Alice Walker
• Meridian (comics), 2000–2004 comic book series published by CrossGen
• Meridian (W.I.T.C.H.), a fictional realm in the Italian comic book series W.I.T.C.H.
• Meridians: feminism, race, transnationalism (est. 2000), an interdisciplinary peer-reviewed feminist journal

Film and television

• Meridian: Kiss of the Beast, 1990 horror and romance film directed by Charles Band
• "Meridian" (Star Trek: Deep Space Nine), 1994 episode of the series
• "Meridian" (Stargate SG-1), 2002 episode of the series
• Meridian (film), 2016 film noir thriller directed by Curtis Clark
• ITV Meridian, ITV station for the south and south-east of England

Music

• Meridian Records, record label
• Meridian Dawn, modern death metal band
• Meridian Green, California-based folk musician
• Meridian, 1997 album by Ian Pooley
• Meridian (Miriam Yeung album), 2007 album by Miriam Young
• Meridian, 2012 album by Pinegrove

Other art

• Meridian (Hepworth), 1960 bronze sculpture by British artist Barbara Hepworth

• Meridian Audio, British manufacturer of audio equipment
• Meridian Credit Union, credit union based in Ontario, Canada
• Meridian Energy, New Zealand electricity generation and electricity retailing company
• Nortel Meridian, popular PBX telephone system

• Meridian High Schoo