01 a. Manifesting, exercising, or favoring rigor; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; …
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1.
Manifesting, exercising, or favoring rigor; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration.“He shall be thrown down the Tarpeian Rock With rigorous hands.” — Shak.“We do not connect the scattered phenomena into their rigorous unity.” — De Quincey.
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2.
Severe; intense; inclement; as, a rigorous winter.
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3.
Violent.[Obs.]
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4.
Adhering scrupulously and exactly to accepted principles; hence, logically valid; as, a rigorous proof.(Mathematics, Logic)
Syn.
Rigid; inflexible; unyielding; stiff; severe; austere; stern; harsh; strict; exact.