Noun rigor has 3 senses
- asperity, grimness, hardship, rigor, rigour, severity, rigorousness - something hard to endure; "the asperity of northern winters"
--1 is a kind of difficulty, difficultness
- cogency, validity, rigor, rigour - the quality of being logically valid
--2 is a kind of credibility, credibleness, believability
- severity, harshness, rigor, rigour, inclemency, hardness, stiffness - excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
--3 is a kind of sternness, strictness
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