| NOUN | act | ECM, electronic countermeasures | electronic warfare undertaken to prevent or reduce an enemy's effective use of the electromagnetic spectrum |
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| Meaning | electronic warfare undertaken to prevent or reduce an enemy's effective use of the electromagnetic spectrum. | |
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| Synonym | electronic countermeasures | |
| Narrower | electronic deception | The deliberate use of electromagnetic energy in a manner intended to convey misleading information |
| jamming, electronic jamming, jam | Deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems | |
| Broader | electronic warfare, EW | military action involving the use of electromagnetic energy to determine or exploit or reduce or prevent hostile use of the electromagnetic spectrum |
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