rig·​or·​ous | \ ˈri-g(ə-)rəs How to pronounce rigorous (audio) \

Definition of rigorous

1 : manifesting, exercising, or favoring rigor : very strict
2a : marked by extremes of temperature or climate
3 : scrupulously accurate : precise

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Other Words from rigorous

rigorously adverb
rigorousness noun

Choose the Right Synonym for rigorous

rigid, rigorous, strict, stringent mean extremely severe or stern. rigid implies uncompromising inflexibility. rigid rules of conduct rigorous implies the imposition of hardship and difficulty. the rigorous training of recruits strict emphasizes undeviating conformity to rules, standards, or requirements. strict enforcement of the law stringent suggests severe, tight restriction or limitation. stringent standards of admission

Examples of rigorous in a Sentence

rigorous enforcement of the rules a rigorous course of study We subjected the data to a rigorous analysis.
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Recent Examples on the Web By adhering to rigorous global standards, the industry can help build public confidence and continue to earn trust among regulators, patients, and prescribers. Leah Christl, STAT, "From bench to bedside, biologics require excellence at every stage," 13 Feb. 2020 But patents are not the same thing as a full-fledged idea undergoing rigorous testing. Courtney Linder, Popular Mechanics, "Amazon Patents a System for Whipping Stuff Into the Air (or Space)," 13 Feb. 2020 While these processes can quickly become extremely complex and rigorous, even the most seasoned astrologers still evaluate compatibility based on sun sign. Sophie Saint Thomas, Allure, "Zodiac Love Compatibility: Which Signs to Date — and Which to Avoid," 12 Feb. 2020 Indeed, the investigation showed an utterly unregulated shadow school system that often vaults families with means into nurturing, rigorous schools largely unavailable to their poorer peers. USA Today, "Two boys with the same disability tried to get help. The rich student got it quickly. The poor student did not.," 9 Feb. 2020 But after a year and a half more of rigorous testing, he and his colleagues are convinced of the find. National Geographic, "You may have more Neanderthal DNA than you think," 30 Jan. 2020 Given the stakes, the U.S. government should offer greater rewards for behavioral interventions that can demonstrate long-term gains under the same rigorous regulatory standards similar to those required of new drugs. Dana Goldman, The Conversation, "Obesity, second to smoking as the most preventable cause of US deaths, needs new approaches," 27 Jan. 2020 Chinese foreign ministry spokesman Geng Shuang pledged rigorous measures to tackle the virus. Emily Wang, Dake Kang, Yanan Wang, Anchorage Daily News, "As virus spreads, anxiety rises in China and overseas," 21 Jan. 2020 First, students had to meet the same rigorous admissions standards set for the UT’s flagship school in Austin. Eva-marie Ayala, Dallas News, "Antarctica adventurer, former UTD president Robert Rutford remembered for charting new courses," 9 Jan. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rigorous.' 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 rigorous

15th century, in the meaning defined at sense 1

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Time Traveler for rigorous

Time Traveler

The first known use of rigorous was in the 15th century

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Last Updated

24 Feb 2020

Cite this Entry

“Rigorous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rigorous. Accessed 28 Feb. 2020.

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More Definitions for rigorous


How to pronounce rigorous (audio)

English Language Learners Definition of rigorous

: very strict and demanding
: done carefully and with a lot of attention to detail
: difficult to endure because of extreme conditions


rig·​or·​ous | \ ˈri-gə-rəs How to pronounce rigorous (audio) \

Kids Definition of rigorous

1 : very strict rigorous rules
2 : hard to endure because of extreme conditions : harsh rigorous winters

Other Words from rigorous

rigorously adverb

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