1. of or relating to the North or South Pole.
  2. of or relating to the pole of any sphere, a magnet, an electric cell, etc.
  3. opposite in character or action: The two have personalities that are polar.
  4. capable of ionizing, as NaCl, HCl, or NaOH; electrolytic; heteropolar.
  5. central; pivotal: the polar provision of the treaty.
  6. analogous to the polestar as a guide; guiding: a polar precept.

Origin of polar

From the Medieval Latin word polāris, dating back to 1545–55. See pole2, -ar1
Related formsan·ti·po·lar, adjectivetrans·po·lar, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for transpolar

Historical Examples of transpolar

  • Sure, I thot at th' very last 'twas a foine big liner from the Orient and Transpolar run, dropped down here from the hoigh livils!

    The Finding of Haldgren

    Charles Willard Diffin

British Dictionary definitions for transpolar


  1. crossing a polar region


  1. situated at or near, coming from, or relating to either of the earth's poles or the area inside the Arctic or Antarctic Circlespolar regions
  2. having or relating to a pole or poles
  3. pivotal or guiding in the manner of the Pole Star
  4. directly opposite, as in tendency or character
  5. chem
    1. Also: heteropolar(of a molecule or compound) being or having a molecule in which there is an uneven distribution of electrons and thus a permanent dipole momentwater has polar molecules
    2. (of a crystal or substance) being or having a crystal that is bound by ionic bondssodium chloride forms polar crystals
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 transpolar



1550s, from Middle French polaire (16c.) or directly from Medieval Latin polaris "of or pertaining to the poles," from Latin polus "an end of an axis" (see pole (n.2)). Meaning "directly opposite in character or tendency" is attested from 1832. Polar bear first recorded 1781.

Online Etymology Dictionary, © 2010 Douglas Harper

transpolar in Medicine


  1. Of or relating to a pole.
  2. Having poles. Used of certain nerve cells having one or more processes.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

transpolar in Science


  1. Relating to a pole, such as the pole of a magnet or one of the electrodes of an electrolytic cell.
  2. Relating to the North Pole or the South Pole of Earth, or analogous regions of another planet.
  3. Relating to a molecule or substance that has polar bonds.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.