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

 

regimen

 noun
noun
BrE BrE//ˈredʒɪmən//
 
; NAmE NAmE//ˈredʒɪmən//
 
(also regime)(medical or formal) Healthy eating habits, Exercise
 
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a set of rules about food and exercise or medical treatment that you follow in order to stay healthy or to improve your health a strict regimen a daily regimen of exercise See related entries: Healthy eating habits, Exercise Word Origin late Middle English (denoting the action of governing): from Latin, from regere ‘to rule’.Extra examples He began a new fitness regimen. It is important to maintain a training regimen. She follows a strict fitness regimen. We used a combined regimen of chemotherapy and radiation therapy. a sensible daily regimen of vitamin supplements a strenuous training regimen a treatment regimen comprising two antibiotics A strict regimen of wheat-free diet in the hospital had a favourable effect.
See the Oxford Advanced American Dictionary entry: regimen