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Etymology 1[edit]

defuse +‎ -ion, apparently by analogy with fusion etc.


English Wikipedia has an article on:

defusion (uncountable)

  1. (proscribed) The act of defusing.
    • 1975, Peter Wilsher and Rosemary Righter, The Exploding Cities, Quadrangle, New York Times Book Co., →ISBN, page 13
      It seemed to us to express the right mixture of urgent concern and bracing responsibility that the middle 1970s require. But as the whole book shows, the megalopolitan time bomb is ticking uncomfortably fast. There is little margin for anyone to take a leisurely defusion course.
    • 1987, Y. S. Shurakov and L. Nicholas (translators), Vladimir Karpov (author), The Commander, Brassey's, page 228
      The loss of the collections was immediately reported to General Petrov and he detailed a special team of engineers and mine defusion experts to aid the men of the 164th battalion in their search.
    • 1992, Scott M. Cutlip, “The invasion of public relations' domain by lawyers and marketers”, section 1, Communication World, International Association of Business Communicators
      Contrast Exxon's failures with Johnson & Johnson's successful defusion of its Tylenol crisis - that response directed by a seasoned public relations officer - Larry Foster.
    • 1999, Elizabeth Economy and Michel Oksenberg, China Joins the World: Progress and Prospects, Council on Foreign Relations, →ISBN, page 115
      China’s long border made land mines an essential and legitimate means of defense, and the costs of converting large stockpiles and its productions lines to meet the three criteria in the revised Protocol II (detectability, self-defusion, and self-destruction) would be enormous.
    • 20C, R. K. Murthi (translator), Salma Zaidi (author), The Prophecies of Nostradamus, Pustak Mahal, Delhi, →ISBN, page 129
      The story (as all stories do) ends with the timely interception of the bomb and its defusion.
    • 2002 August 1, Sara Powell, “Nuclear-powered animosities. (Human Rights)”, Washington Report on Middle East Affairs, American Educational Trust
      Dr. Ghulam Nabi Fai, executive director of the Kashmiri-American Council, argued that the international community...made a fundamental mistake by making its primary objective the defusion of tension rather than trying to settle the issue of Kashmir.

Etymology 2[edit]

de- +‎ fusion


defusion (countable and uncountable, plural defusions)

  1. (psychology) The separation of an emotion or behavior-provoking verbal stimulus from the unwanted emotional or behavioral response as part of a therapeutic process. A neologism meant to indicate the reversal of thought-emotion-action fusion.
    • 1994 Steven C. Hayes, "Content, context, and the types of psychological acceptance", Context Press, →ISBN, page 31.
      [] acceptance involves deliteralization: the defusion of the derived relations and functions of events from the direct functions of these events.

Etymology 3[edit]



  1. Misspelling of diffusion.
    • 1946 June 29, David B. Parker (editor), A Bombing Of Hiroshima And Nagasaki, The Manhattan Engineer District, Kessinger Publishing (2004), →ISBN, page 27
      The duration of the heat radiation from the bomb is so short, just a few thousandths of a second, that there is no time for the energy falling on a surface to be dissipated by thermal defusion; the flash burn is typically a surface effect.