the day of the Last Judgment, at the end of the world.
2.
any day of judgment or sentence.
3.
nuclear destruction of the world.
adjective
4.
given to or marked by forebodings or predictions of impending calamity; especially concerned with or predicting future universal destruction: the doomsday issue of all-out nuclear war.
5.
capable of causing widespread or total destruction: doomsday weapons.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
the offspring of a zebra and a donkey.
the offspring of a zebra and a donkey.
a stew of meat, vegetables, potatoes, etc.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
O.E. domesdæg, from domes, gen. of dom (see doom) + dæg "day." In medieval England it was expected when the world's age reached 6,000 years from creation, which was thought to have been in 5200 B.C. Bede, c.720, complained of being pestered by rustici asking him
how many years till the sixth millennium ended. There is no evidence for a general panic in the year 1000 C.E. Doomsday machine "bomb powerful enough to wipe out human life on earth" is from 1960.