[ rig-er ]
See synonyms for rigor on Thesaurus.com
  1. strictness, severity, or harshness, as in dealing with people.

  2. the full or extreme severity of laws, rules, etc.

  1. severity of living conditions; hardship; austerity: the rigor of wartime existence.

  2. a severe or harsh act, circumstance, etc.

  3. scrupulous or inflexible accuracy or adherence: the logical rigor of mathematics.

  4. severity of weather or climate or an instance of this: the rigors of winter.

  5. Pathology. a sudden coldness, as that preceding certain fevers; chill.

  6. Physiology. a state of rigidity in muscle tissues during which they are unable to respond to stimuli due to the coagulation of muscle protein.

  7. Obsolete. stiffness or rigidity.

Origin of rigor

1350–1400; Middle English rigour<Latin rigor stiffness, equivalent to rig(ēre) to be stiff + -or-or1
  • Also especially British, rig·our .

Other words for rigor

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use rigor in a sentence

British Dictionary definitions for rigor


/ (ˈraɪɡɔː, ˈrɪɡə) /

  1. med a sudden feeling of chilliness, often accompanied by shivering: it sometimes precedes a fever

  2. (ˈrɪɡə) pathol rigidity of a muscle; muscular cramp

  1. a state of rigidity assumed by some animals in reaction to sudden shock

  2. the inertia assumed by some plants in conditions unfavourable to growth

Origin of rigor

see rigour

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012