1. the quality of being extremely thorough, accurate, or demanding
2. the quality of being harsh or severe

Examples

• The rigorousness of the training program prepared athletes for competition.
• Students appreciated the rigorousness of the academic standards.
• The rigorousness of the winter weather made travel dangerous.
• Her research was praised for its rigorousness and attention to detail.
• The rigorousness of the examination process ensured only qualified candidates passed.
• The coach’s rigorousness in practice led to improved team performance.