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Definitions

rigor

[rig-er] / ˈrɪg ər /
NOUN
strictness, exactness
Synonyms
STRONGEST
accuracy austerity difficulty firmness hardship harshness ordeal precision rigidity tenacity tribulation vicissitude
STRONG
affliction asperity conscientiousness conventionalism exactitude hardness inclemency inflexibility intolerance meticulousness obduracy preciseness privation punctiliousness roughness severity sternness stiffness stringency suffering thoroughness traditionalism trial visitation
Antonyms
STRONGEST
calm calmness ease happiness inaccuracy peace pleasure weakness
STRONG
health kindness
WEAK
elasticity flexibility leniency pliability

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This approach offers a much higher level of statistical rigor than most previous studies.

From Science Daily • Apr. 5, 2026

He guided the bureau through the aftermath of the September 11 attacks, shifting focus toward counterterrorism while maintaining its investigative rigor.

From Salon • Mar. 21, 2026

The inquest was told rigor mortis - the stiffening of the body after death - had set in.

From BBC • Mar. 20, 2026

“Constructive engagement with sponsors while maintaining scientific rigor would be a welcome respite,” Leerink Partners analyst Joseph Schwartz told investors on Sunday.

From MarketWatch • Mar. 9, 2026

It satisfies the mathematician's strict requirement of logical rigor.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.