| Acronym | Definition |
|---|
| ECHO | Extended Care Health Option (TRICARE supplement) |
| Echo | Echocardiogram |
| ECHO | Exploring Cultural Heritage Online |
| ECHO | Electronic Clearing House, Inc |
| ECHO | European Community Humanitarian Office |
| ECHO | Educational Concerns for Hunger Organization (Florida) |
| ECHO | European Commission's Humanitarian Aid Office |
| ECHO | Enforcement & Compliance History Online (EPA website) |
| ECHO | Ethnicity, Culture and Health Outcomes |
| ECHO | Executive Council of Homeowners |
| ECHO | European Commission Host Organisation (online database in all European languages) |
| ECHO | European Cultural Heritage Online (international cultural project) |
| ECHO | Enteric Cytopathogenic Human Orphan (virus) |
| ECHO | Elder Cottage Housing Opportunity |
| ECHO | Emergency Care Help Organization |
| ECHO | Experience of Care and Health Outcomes |
| ECHO | Expressive Communication Help Organization |
| ECHO | EOS Clearinghouse |
| ECHO | European Chronicles Online |
| ECHO | Economic, Clinical and Humanistic Outcomes (measurment of disease and therapeuthic outcomes) |
| ECHO | Evangelical Christian Humanitarian Outreach |
| ECHO | Earth Observing System Clearinghouse |
| ECHO | Early Childhood Higher-Education Options |
| ECHO | Environmental Conservation Hotlinks |
| ECHO | Experiment for Coordinated Helioseismic Observations |
| ECHO | Ecological, Cultural, Heritage and Outdoors |
| ECHO | Eastern Co-operative Health Organization |
| ECHO | Every Citizen Has Opportunities, Inc. |
| ECHO | Egyptian Cultural Heritage Organization |
| ECHO | Expected Consequences of Hearing Aid Ownership |
| ECHO | Emergency Counter-Hostilities Organization (spy game) |
| ECHO | Each Community Helps Others (EPA program) |
| ECHO | Etudiants-Chercheurs de l'Onera (French) |
| ECHO | Ecology, Culture, History, Opportunity |
| ECHO | Every Child Holds Opportunity (Sacramento, CA special education coalition) |
| ECHO | Environmental, Cultural, Historic and Outdoor |
| ECHO | Emerald Centre for Hope and Outreach |
| ECHO | Educated Choices Heighten Opportunities (Yarmouth, ME) |
| ECHO | Ecumenical Community Helping Others, Inc. |
| ECHO | Expertise Centrum Hoger Onderwijs (Belgium) |
| ECHO | Expanded Characteristic Option |
| ECHO | Emotions, Cognitions, Heredity and Outcome (psychiatry) |
| ECHO | Enhanced C4isr for Homeland Security Operations |
| ECHO | Evolutionary Capability for HQ Operations |
| ECHO | Call sign for electronic warfare test range at China Lake |
| ECHO | Elderly Citizens Holiday Organisation (Australia) |
| ECHO | Escherichia Coli Help Organization |
| ECHO | Electronic Communications with Home Office (State Farm Insurance) |
| ECHO | Earth Change Hazard Observatory (radar satellite proposed to NASA and CNES) |
| ECHO | Emerson Heights Community Organization (Indianapolis, IN) |
| ECHO | English Conversation Hello Okay (English Speaking Club in Korea) |