First recorded in 1350–1400; Middle English word from Medieval Latin word rigōrōsus. See rigor, -ous (Source: dictionary.com)

Late Middle English from Old French rigorous or late Latin rigorosus, from rigor ‘stiffness’ (see rigor). (Source: lexico.com)

Definitions of Rigorous



  1. characterized by
  2. severely exact or accurate; precise:
  3. (of weather or climate) uncomfortably severe or harsh; extremely inclement.
  4. Logic, Mathematics. logically valid.
  5. characterized by or proceeding from rigour; harsh, strict, or severerigorous discipline
  6. severely accurate; scrupulousrigorous book-keeping
  7. (esp of weather) extreme or harsh
  8. maths logic (of a proof) making the validity of the successive steps completely explicit




  1. Extremely thorough and careful.




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


Example sentences for Rigorous

  1. But Olds did more than build Nurse-Family Partnership; he did the rigorous evaluation to prove it would work.
  2. Turning the tide of the epidemic, he says, will require “rigorous contact, tracing, and quarantining.”
  3. Therefore, we can at least infer that the people of Saint-Jean-des-Vignes did not have a rigorous eugenics program like Sparta.
  4. And that kind of rigorous attention to detail is not something you can normally do in television.
  5. The best performing middle schools place great emphasis on “future-focus”—on rigorous high-school curriculum.
  6. And for which had every Individual been hanged, few I imagine would think that Justice had been rigorous.
  7. They were, besides, made amenable to a most rigorous system of laws, the least infraction of which was punished with death.
  8. These castes were kept apart by a rigorous series of religious taboos.
  9. But it was difficult to state intelligibly the grounds of this belief to that man of rigorous logic, if of infinite charity.
  10. The luxury of them was new to him, yet not unpleasing after many years of rigorous self-denial and poverty.

Related words & Synonyms

stern, austere, hard, inflexible, stiff, unyielding, strict, precise, uncompromising, onerous, stringent, harsh, scrupulous, meticulous, brutal, correct, strict, burdensome, rigid, exacting, proper, accurate, ascetic, austere, bitter, definite, dogmatic

Nearby words

rigolet , rigoletto , rigor , rigor mortis , rigorism , rigour , rigsdag , rigsdaler , riis , rijeka


flexible, soft, inaccurate, mild

Subscribe to our updates
79 345 subscribers already with us
Check the price
for your project


  • Empty list