[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
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.What I know of farming:
a drain buried below agricultural land
to bury such drains below (agricultural land)
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