| ecm | | |
| n. (act) | 1. ecm, electronic countermeasures | electronic warfare undertaken to prevent or reduce an enemy's effective use of the electromagnetic spectrum. |
| ~ 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. |
| ~ electronic deception | the deliberate use of electromagnetic energy in a manner intended to convey misleading information. |
| ~ electronic jamming, jamming, jam | deliberate radiation or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices or systems. |
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