doomsday
n. uncountable C1 Advanced US //ˈdumzˌdeɪ// UK //dˈuːmsdeɪ// dooms·day
n. the end of the world or a time of terrible destruction. People often use it to talk about a future event that will cause everything to fail.
n. the final day of the world's existence; a time of catastrophic destruction or ultimate judgment. Often used metaphorically to describe a predicted moment of total failure or collapse.
Some people prepare for doomsday by storing extra food.
Environmental scientists warned that ignoring the climate crisis could lead to a doomsday scenario for coastal cities.
The novel explores the psychological toll on a small community as they await a predicted doomsday that never actually arrives.
Usage
Often used as a modifier before another noun, such as 'doomsday clock' or 'doomsday scenario'.