Definitions of rigour
  1. noun
    excessive sternness
  2. noun
    something hard to endure
    synonyms: asperity, grimness, hardship, rigor, rigorousness, rigourousness, severeness, severity
    see moresee less
    the quality (as of scenery) being grim and gloomy and forbidding
    type of:
    difficultness, difficulty
    the quality of being difficult
  3. noun
    the quality of being valid and rigorous
    synonyms: cogency, rigor, validity
    see moresee less
    type of:
    believability, credibility, credibleness
    the quality of being believable or trustworthy
Word Family

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week