dooms·day 
/ˈdu:mzˌdeɪ/ noun
/ˈdu:mzˌdeɪ/ noun [singular] : the day the world ends or is destroyed
▪ a warning that doomsday is near ▪ doomsday predictions ▪ The book explores a doomsday scenario in which an asteroid hits the Earth. ▪ a doomsday machine [=a machine that will destroy the world] ▪ It'll be like that from now until doomsday. [=for a very long time; forever]
▪ a warning that doomsday is near ▪ doomsday predictions ▪ The book explores a doomsday scenario in which an asteroid hits the Earth. ▪ a doomsday machine [=a machine that will destroy the world] ▪ It'll be like that from now until doomsday. [=for a very long time; forever]
