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

 

supplementation

 noun
noun
BrE BrE//ˌsʌplɪmenˈteɪʃn//
 
; NAmE NAmE//ˌsʌplɪmenˈteɪʃn//
 
[uncountable]supplementation (of something) (with something)
 
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the act of adding something to something else in order to improve or complete it One study found that supplementation with the mineral selenium reduced the risk of dying from cancer by 50%. dietary/nutritional/vitamin supplementation