rigor mortis

American  

[rig-er mawr-tis, rahy-gawr] / ˈrɪg ər ˈmɔr tɪs, ˈraɪ gɔr /

noun

1. the stiffening of the body after death.

---

rigor mortis British  

/ ˈrɪɡə ˈmɔːtɪs /

noun

1. pathol the stiffness of joints and muscular rigidity of a dead body, caused by depletion of ATP in the tissues. It begins two to four hours after death and lasts up to about four days, after which the muscles and joints relax

---

rigor mortis Scientific  

/ rĭg′ərmôr′tĭs /

1. Muscular stiffening following death, resulting from the unavailability of energy needed to interrupt contraction of the muscle fibers.

---

rigor mortis Cultural  

1. Stiffening of the muscles of the body that occurs after death. Rigor mortis is Latin for “stiffness of death.”

---

Discover More

Figuratively, rigor mortis refers to an absence of flexibility or vitality: “By the time the school finally closed, rigor mortis had set in in nearly every department.”

Etymology

Origin of rigor mortis

1830–40; < Latin: literally, stiffness of death

Example Sentences

The inquest was told rigor mortis - the stiffening of the body after death - had set in.

From BBC • Mar. 20, 2026

Berry nails every lyrical note of domestic rigor mortis in “Every Day a Little Death.”

From Los Angeles Times • May 2, 2023

The paramedics were called into a room where the lead nurse was performing CPR on a dead man with rigor mortis.

From Seattle Times • Feb. 6, 2023

To make it easier on a woman who has snuck past security to see her father's body, he wraps gauze around his head to close the open mouth that occurs when rigor mortis sets in.

From Salon • Sep. 21, 2021

Once removed from its pore, the hair immediately stiffened in rapid rigor mortis.

From "Artemis Fowl" by Eoin Colfer