the artificial application of water to land to assist in the production of crops.
Medicine/Medical. the flushing or washing out of anything with water or other liquid.
the state of being irrigated.
Origin of irrigation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
"a supplying of water to land," 1610s, from Latin irrigationem (nominative irrigatio) "a watering," noun of action from past participle stem of irrigare (see irrigate).
Online Etymology Dictionary, © 2010 Douglas Harper
Artificial provision of water to sustain growing plants.
Irrigation accounts for the greatest part of water usage in the western United States.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.