verb (used with object), sub·ir·ri·gat·ed, sub·ir·ri·gat·ing.

to irrigate beneath the surface of the ground, as with water passing through a system of underground porous pipes or transmitted through the subsoil from ditches, etc.

Origin of subirrigate

An Americanism dating back to 1900–05; sub- + irrigate
Related formssub·ir·ri·ga·tion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for subirrigate



to irrigate (land) by means of an underground system of pipe lines or by natural moisture in the subsoil
Derived Formssubirrigation, 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