[noun uhn-der-dreyn; verb uhn-der-dreyn]


a drain placed beneath the surface of cultivated fields, streets, etc.

verb (used with object)

to equip or supply with an underdrain or underdrains.

Origin of underdrain

First recorded in 1795–1805; under- + drain
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for underdrain

Historical Examples of underdrain

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

British Dictionary definitions for underdrain


noun (ˈʌndəˌdreɪn)

a drain buried below agricultural land

verb (ˌʌndəˈdreɪn)

to bury such drains below (agricultural land)
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