• noun:   action intended to nullify the effects of some previous action
• noun:   action intended to keep a country politically neutral or exclude it from a possible war

  Example: "The neutralization of Belgium"

• noun:   (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation)
• noun:   a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water

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