definition 1: strictness, severity, inflexibility, or harshness, as of manner, judgment, or law.
example: The law was enforced with great rigor.
definition 2: (often plural) severity or harshness of living conditions, climate, or other circumstances.
example: These tires are meant to handle the rigors of winter weather.
definition 3: strict or scrupulous accuracy; precision; exactness.
example: The research was carried out with scientific rigor.
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