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  1. Rigor Definition & Meaning - Merriam-Webster

  2. RIGOR | English meaning - Cambridge Dictionary

  3. RIGOR Definition & Meaning | Dictionary.com

  4. RIGOR | definition in the Cambridge English Dictionary

  5. Rigor - Definition, Meaning & Synonyms | Vocabulary.com

  6. RIGOR Synonyms: 137 Similar and Opposite Words - Merriam-Webster

  7. rigor noun - Definition, pictures, pronunciation and usage notes ...

  8. Rigor Definition & Meaning | YourDictionary

  9. Rigor - definition of rigor by The Free Dictionary

  10. Rigor Definition & Meaning | Britannica Dictionary