Definition of irrigation noun from the Oxford Advanced Learner's Dictionary

 

irrigation

 noun
noun
BrE BrE//ˌɪrɪˈɡeɪʃn//
 
; NAmE NAmE//ˌɪrɪˈɡeɪʃn//
 
[uncountable]
 
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the practice of supplying water to an area of land through pipes or channels so that crops will grow irrigation channels Irrigation has increased the area of cultivable land.