reg·​i·​men | \ ˈre-jə-mən How to pronounce regimen (audio) also ˈre-zhə- How to pronounce regimen (audio) \

Definition of regimen

1a : a systematic plan (as of diet, therapy, or medication) especially when designed to improve and maintain the health of a patient
b : a regular course of action and especially of strenuous training the daily regimen of athletes

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We borrowed "regimen" straight from Latin, spelling and all - but in Latin, the word simply meant "rule" or "government." In English, it usually refers to a system of rules or guidelines, often for living a healthy life or taking a regular dose of exercise. The Latin regimen derives from another Latin word, the verb "regere," which means "to lead straight" or "to rule." If you trace straight back from "regere," you'll find that "regimen" has plenty of lexical kin, including "correct," "erect," "region," "rule," and "surge." If you are using the "training" sense of "regimen," be careful not to confuse the word with "regiment," another "regere" descendant, which is used for a military unit.

Examples of regimen in a Sentence

with the start of the new year, a new party will have regimen over the nation and, hopefully, bring some much-needed change
Recent Examples on the Web The same treatment regimen will decrease the odds a severe COVID-19 patient will need a ventilator by 7%, the analysis found. Evan Macdonald, cleveland, 9 July 2021 The two companies plan to submit their booster data to the FDA to request that a third dose be added to the current regimen. Alice Park, Time, 8 July 2021 Thanks to Covid-19, the cleaning regimen has gotten even more intensive. Kate Aronoff, The New Republic, 1 July 2021 The regimen destroys many of the diseased cells and weakens the immune system to keep the body from rejecting the donor cells. Wunmi Bakare, Essence, 19 June 2021 But some are questioning the need to move ahead so quickly, using the same two-dose regimen that was designed for adults. Karen Kaplan Science And Medicine Editor, Los Angeles Times, 18 June 2021 The regimen starts with makeup wipes, any kind of makeup wipe. Hannah Dylan Pasternak, SELF, 17 June 2021 But under the biodynamic regimen, Maya has started applying a stinging-nettle tonic to the grapes when a heat spike begins. Esther Mobley, San Francisco Chronicle, 12 June 2021 Not every world leader has completed the full vaccination regimen. Andrew Restuccia And Max Colchester, WSJ, 11 June 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'regimen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of regimen

14th century, in the meaning defined at sense 1a

History and Etymology for regimen

Middle English, from Medieval Latin regimin-, regimen position of authority, direction, set of rules, from Latin, steering, control, from regere to direct

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Time Traveler for regimen

Time Traveler

The first known use of regimen was in the 14th century

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Last Updated

14 Jul 2021

Cite this Entry

“Regimen.” Dictionary, Merriam-Webster, Accessed 23 Jul. 2021.

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More Definitions for regimen



English Language Learners Definition of regimen

: a plan or set of rules about food, exercise, etc., to make someone become or stay healthy


reg·​i·​men | \ ˈre-jə-mən How to pronounce regimen (audio) \

Kids Definition of regimen

: a systematic course of action a daily exercise regimen


reg·​i·​men | \ ˈrej-ə-mən also ˈrezh-ə- \

Medical Definition of regimen

: a systematic plan (as of diet, therapy, or medication) especially when designed to improve and maintain the health of a patient

More from Merriam-Webster on regimen

Nglish: Translation of regimen for Spanish Speakers

Britannica English: Translation of regimen for Arabic Speakers


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