RIGOUR Meaning of RIGOUR in English ( US rigor ) ■ noun1》 the quality of being rigorous. ↘severity or strictness. 2》 ( ~s ) demanding, extreme conditions.OriginME: from OFr. ~ from L. rigor 'stiffness'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004