• synonyms


[law-ren-shuh n]
  1. of or relating to the St. Lawrence River.
  2. Geology. noting or pertaining to the granite intrusions and orogeny in Canada around the Great Lakes during Archeozoic time.
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Origin of Laurentian

1860–65; < Late Latin Laurenti(us) Lawrence (orig. adj., equivalent to Laurent(ēs) men of Laurentum + -ius -ious) + -an

Laurentian Mountains

plural noun
  1. a range of low mountains in E Canada, between the St. Lawrence River and Hudson Bay.
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Also called Lau·ren·tians.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for laurentian

Historical Examples

  • In this broad sense we may be said to be still living in the Laurentian epoch.

    The Story of the Earth and Man

    J. W. Dawson

  • It is also akin to the Serpentine filling the pores of Eozoon in the Laurentian.

  • From the Laurentian up to the recent rocks there has never been any real hiatus.

  • The white and gray Laurentian boulders lay along the roadside.

  • It is from this model that Vasari executed the much-criticised staircase of the Laurentian.


    Romain Rolland

British Dictionary definitions for laurentian


  1. Also: Lawrentian of or resembling the style of D. H. Lawrence or T. E. Lawrence
  2. of, relating to, or situated near the St Lawrence River
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Laurentian Mountains

pl n
  1. a range of low mountains in E Canada, in Quebec between the St Lawrence River and Hudson Bay. Highest point: 1191 m (3905 ft)Also called: Laurentides (ˈlɔːrənˌtaɪdz)
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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

Word Origin and History for laurentian


in reference to granite strata in eastern Canada, 1863, named for the Laurentian Mountains, where it is found, which are named for the nearby St. Lawrence River. Hence, Laurasia, Paleozoic supercontinent comprising North America and Eurasia, 1931, from German (1928), from Laurentia, geologists' name for the ancient core of North America + (Eur)asia.

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Online Etymology Dictionary, © 2010 Douglas Harper