/ˈhɑːləkɔːst/
holo·caust
BrE /ˈhɒləkɔːst/
NAmE /ˈhɑːləkɔːst/,
/ˈhoʊləkɔːst/
[C]
a situation in which many things are destroyed and many people killed, especially because of a war or a fire
a nuclear holocaust
the Holocaust [sing.]
the killing of millions of Jews by the Nazis in the 1930s and 1940s