rig·​or·​ous | \ ˈri-g(ə-)rəs \

Definition of rigorous

1 : manifesting, exercising, or favoring rigor : very strict
2a : marked by extremes of temperature or climate
b : harsh, severe
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

The testing was rigorous, comprehensive and exhaustive. Allison Barrie, Fox News, "Weapons upgrade set to make US Special Operations even more deadly," 13 Sep. 2018 When Facebook hired him in 2011, he was hailed by Republicans and Democrats alike as an informed and rigorous policy maker. Deepa Seetharaman, WSJ, "Facebook’s Lonely Conservative Takes on a Power Position," 23 Dec. 2018 Colin McEvoy, the principal of Millennium, a rigorous and popular school of about 700 students in Manhattan’s financial district, invited him to join the class of 2018. New York Times, "At Graduation, a Son in the Limelight and a Father in the Shadows," 3 July 2018 With marijuana performing impressively under rigorous controls, pressure likely will grow to pull the drug from the federal all-bad list, which would broaden horizons for research and development. Anne Saker, Cincinnati.com, "Cincinnati tested the marijuana drug that the FDA has just approved," 27 June 2018 The most that can and will be said is that, despite Coach Pitino’s rigorous and diligent supervision of staff, some engaged in misdeeds. Gentry Estes, The Courier-Journal, "Attorneys: Louisville smeared Rick Pitino and Tom Jurich to save money," 4 June 2018 Training is hard and rigorous and includes learning the history of the Tomb of the Unknowns, ceremonial steps, cadence, military bearing, uniform prep and weapons training. Dawn Mitchell, Indianapolis Star, "Hoosier Sentinel at the Tomb of the Unknown Soldier was a 'haunting obligation'," 25 May 2018 Godwin took over Mary’s education and raised her to be a rigorous and unorthodox thinker. Josephine Livingstone, The New Republic, "Poor Mary Shelley!," 23 May 2018 The film is interspersed with Toller’s diary entries, which start out thoughtful and rigorous and slowly begin to sound more haunted. David Sims, The Atlantic, "The Bracing, Grim Power of First Reformed," 18 May 2018

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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Dictionary Entries near rigorous



rigor mortis





Statistics for rigorous

Last Updated

13 Jan 2019

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Time Traveler for rigorous

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

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More Definitions for rigorous



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 \

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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More from Merriam-Webster on rigorous

Thesaurus: All synonyms and antonyms for rigorous

Spanish Central: Translation of rigorous

Nglish: Translation of rigorous for Spanish Speakers

Britannica English: Translation of rigorous for Arabic Speakers

Comments on rigorous

What made you want to look up rigorous? Please tell us where you read or heard it (including the quote, if possible).


a complex dispute or argument

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