electronic countermeasures

plural noun
  1. the use of electronic technology to jam and deceive enemy radars, especially those used for air defense and interception. Abbreviation: ECM

Origin of electronic countermeasures

First recorded in 1965–70
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British Dictionary definitions for electronic countermeasures

electronic countermeasures

pl n
  1. military (in electronic warfare) actions intended to interfere with an enemy's use of electromagnetic radiation equipment
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