[rig.or] n [ME rigour, fr. MF rigueur, fr. L rigor, lit., stiffness, fr. rigere to be stiff] (14c) 1 a (1): harsh inflexibility in opinion, temper, or judgment: severity (2): the quality of being unyielding or inflexible: strictness (3): severity of life: austerity b: an act or instance of strictness, severity, or cruelty
2: a tremor caused by a chill
3: a condition that makes life difficult, challenging, or uncomfortable; esp: extremity of cold
4: strict precision: exactness "logical ~"
5. a obs: rigidity, stiffness b: rigidness or torpor of organs or tissue that prevents response to stimuli