• synonyms


[noun uhn-der-dreyn; verb uhn-der-dreyn]
  1. a drain placed beneath the surface of cultivated fields, streets, etc.
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verb (used with object)
  1. to equip or supply with an underdrain or underdrains.
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Origin of underdrain

First recorded in 1795–1805; under- + drain
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for underdrain

Historical Examples

  • I would urge no farmer to plunge up to his neck into debt in order to underdrain his farm.

    What I know of farming:

    Horace Greeley

British Dictionary definitions for underdrain


noun (ˈʌndəˌdreɪn)
  1. a drain buried below agricultural land
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verb (ˌʌndəˈdreɪn)
  1. to bury such drains below (agricultural land)
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Derived Formsunderdrainage, noun
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