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meridian

[ muh-rid-ee-uhn ]
/ məˈrɪd i ən /
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Definition of meridian

noun
Geography.
  1. a great circle of the earth passing through the poles and any given point on the earth's surface.
  2. the half of such a circle included between the poles.
Astronomy. the great circle of the celestial sphere that passes through its poles and the observer's zenith.
a point or period of highest development, greatest prosperity, or the like.
(in acupuncture) any of the pathways in the body along which vital energy flows.
adjective
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Origin of meridian

1350–1400; Middle English <Latin merīdiānus of noon, equivalent to merīdi(ēs) midday (formed from the locative merīdiē at midday, by dissimilation <*medī diē; mediusmid1, diēs day) + -ānus-an

Other definitions for meridian (2 of 2)

Meridian
[ muh-rid-ee-uhn ]
/ məˈrɪd i ən /

noun
a city in E Mississippi.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use meridian in a sentence

British Dictionary definitions for meridian

meridian
/ (məˈrɪdɪən) /

noun
adjective

Word Origin for meridian

C14: from Latin merīdiānus of midday, from merīdiēs midday, from medius mid 1 + diēs day
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for meridian

meridian
[ mə-rĭdē-ən ]

n.
An imaginary line encircling a globular body at right angles to its equator and passing through its poles.
Either half of such a great circle from pole to pole.
Any of the longitudinal lines or pathways on the body along which the acupuncture points are distributed.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for meridian

meridian
[ mə-rĭdē-ən ]

An imaginary line forming a great circle that passes through the Earth's North and South geographic poles.
Either half of such a circle from pole to pole. All the places on the same meridian have the same longitude. See illustration at longitude.
See celestial meridian.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for meridian

meridian
[ (muh-rid-ee-uhn) ]

A great imaginary circle on the surface of the Earth that runs north and south through the North Pole and South Pole. Longitude is measured on meridians: places on a meridian have the same longitude. (See prime meridian.)

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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