what is rigor in medical term
Medical Definition of rigor. 1  1a: chill 1b: a tremor caused by a chill. 2  2a: rigidity or torpor of organs or tissue that prevents response to stimulib: rigor mortis.
Definition of rigor for English Language Learners. 1  rigors : the difficult and unpleasant conditions or experiences that are associated with something. : 2  the quality or state of being very exact, careful, or strict.