RIG'OROUS, a. 1. Severe; allowing no abatement or mitigation; as a rigorous officer of justice.2. Severe; exact; strict; without abatement or relaxation; as a rigorous execution of law; an enforcement of rigorous discipline.3. Exact; strict; scrupulously accurate; as a rigorous definition or demonstration.4. Severe; very cold; as a rigorous winter.
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