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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Did You Know?

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 Typically, her regimen of chemotherapy would require several five-day stays in the hospital spread over 18 weeks. Harold Brubaker Philadelphia Inquirer, Star Tribune, "Cancer treatment tackles a new frontier: Chemo at home, even on the go," 11 Feb. 2021 During her recent pregnancy with daughter Khai, the model said her skin-care regimen shifted toward clean, natural products, mostly made from olive-tree extract. Sarah Midkiff,, "Gigi Hadid Just Dropped Her Full Post-Pregnancy Skin Routine," 4 Feb. 2021 Christina Crosby, an athletic woman who had just turned 50, was three miles into her bicycle-riding regimen near her home in Connecticut when her front spokes snagged a branch. New York Times, "Christina Crosby, 67, Dies; Feminist Scholar Wrote of Becoming Disabled," 26 Jan. 2021 The company will test adding a third shot of its current vaccine to boost its two-dose regimen. Carolyn Y. Johnson, Anchorage Daily News, "Moderna says its coronavirus vaccine protects against British and South African variants," 25 Jan. 2021 Norris began his throwing program on Nov. 17, two months earlier than his normal regimen. Evan Petzold, Detroit Free Press, "Why Detroit Tigers' Daniel Norris believes pitching coach Chris Fetter 'beyond incredible'," 16 Jan. 2021 As of Tuesday, 248,185 doses of the vaccines had been administered in Wisconsin and 40,545 people had completed the two-shot regimen. Scott Bauer, Star Tribune, "Assembly Republicans want public to have vaccine by March," 20 Jan. 2021 Approximately 50-70 patients receive the antibody regimen per day at Houston Methodist. Alison Medley, Chron, "Promising COVID-19 antibody treatment is helping patients stay out of hospital, Houston doctor says," 14 Jan. 2021 The league regimen already includes daily PCR tests for players and coaches, and rapid tests on game days. Tim Reynolds, ajc, "Celtics plan to play Friday, another Suns game called by NBA," 14 Jan. 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

20 Feb 2021

Cite this Entry

“Regimen.” Dictionary, Merriam-Webster, Accessed 26 Feb. 2021.

Style: MLA
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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

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