Phrase guide

doomsday device

noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A hypothetical weapon (often a bomb) programmed to automatically be used in response to certain attacks, usually with very dire consequences (such as the annihilation of the world).

Definition source: English Wiktionary via Wiktextract

Examples

  • Near-synonyms: doomsday bomb, Dead Hand

Meaning relationships

Synonyms: doomsday weapon, doomsday bomb, Dead Hand

Antonyms: none provided

2

noun

Meaning 2

An extremely powerful weapon.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Alternative spelling of doomsday device.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Coined as Doomsday Machine by military strategist Herman Kahn.