The quality of being extremely thorough and accurate. The scientist was known for the rigor of her research methods.
The rigor of the military training was challenging for the new recruits.
A sudden feeling of cold with shivering accompanied by a rise in temperature, often a symptom of an infection. The patient experienced a rigor as the fever began to set in.
Rigidity or stiffness, often used in the context of muscles or the body. The rigor of the corpse indicated that it had been dead for several hours.