massacre
B2Substantiv/US /mˈæsəkɚ/ MĂS-ək-ər; UK /mˈæsəkɚ/ MĂS-ək-ər/
The killing of a considerable number of human beings under circumstances of atrocity or cruelty, or contrary to the usages of civilized people; as, the massacre on Bartholomew's 2.
