- digital countermeasures (to jam or confuse transmissions)
- extracellular matrix
- Initialism of excellent case-marking.
- Initialism of European Common marketplace.
- Engine control component
- electronic warfare done to stop or lower an enemy's effective utilization of the electromagnetic spectrum
- Definition for "ECM"
- Sentence for "ECM"
- Hyponym for "ECM"
- Hypernym for "ECM"
- Urban Dictionary for "ECM"