rigor mortis ri·gor·mor·tis uncommon noun 1. temporary stiffness of joints and muscular rigidity occurring after death Synonymsrigor mortis 2. muscular stiffening that begins 2 to 4 hours after death and last for about 4 days Synonymsrigor mortis Related words Broader terms stiffeningphysiological state WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
