Word.ws English Dictionary

foom

foom interjection: the sound of a muffled explosion.

Interjection

  1. The sound of a muffled explosion.
    • And FOOM-FOOM! the two engines burst together into life...1983, Richard Bach, Biplane
    • Those flat-trajectory shells would skim straight in, making a roaring sound in the dark: Foom! Foom! Foom!2000, James Bradley, Ron Powers, Flags of Our Fathers: Heroes of Iwo Jima

Noun

foom (plural fooms)

  1. A sudden increase in artificial intelligence such that an AI system becomes extremely powerful.
    • There are some scenarios in which private AI research wouldn't be nationalized: •An unexpected AI foom before anyone realizes what was coming.2013, Brian Tomasik, International Cooperation vs. AI Arms Race, page 2
    • Some advocates of this foom scenario say that there is an as-yet-undiscovered but very powerful set of related architectural innovations for AI system design, a set that one team could find first and then keep secret from others for long enough.2016, Robin Hanson, The Age of Em: Work, Love, and Life when Robots Rule the Earth, →ISBN

Verb

foom (third-person singular simple present fooms, present participle fooming, simple past and past participle foomed)

  1. To exhibit an AI foom.
    • The reason an AI can foom so much faster than its society is that an AI can change its basic mental architecture,and humans can’t.2013, Robin Hanson, Eliezer Yudkowsky, The Hanson-Yudkowsky AI-Foom Debate, page 216

Forms of foom

Noun
pluralfooms
Verb
third-person singular presentfooms
present participlefooming
past participlefoomed
pastfoomed

Origin of foom

Imitative. Compare boom.

Questions about foom

What does foom mean?
Foom means the sound of a muffled explosion.
What part of speech is foom?
Foom can be an interjection, a noun or a verb.

Words near foom in the dictionary

  1. foolscaps
  2. foolscreen
  3. foolship
  4. foolships
  5. foolsome
  6. foom
  7. foomed
  8. fooming
  9. fooms
  10. foon
  11. Foong

Source and license

Adapted from Wiktionary: foom (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “foom.” Word.ws, https://word.ws/foom. Based on Wiktionary, CC BY-SA 4.0.