| Acronym | Definition |
|---|
| SEA | South East Asia |
| SEA | State Education Agency |
| SEA | Southeast Asian (games) |
| SEA | Samsung Electronics America |
| SEA | Seattle Mariners (baseball team) |
| SEA | Search Engine Advertising |
| SEA | Strategic Environmental Assessment |
| SEA | NAVSEA (US Navy) |
| SEA | Section of Environmental Analysis |
| SEA | Securities Exchange Act |
| SEA | Single Engine Aircraft |
| SEA | Single European Act (European single market treaty 1986) |
| SEA | Socio-Economic Assessment |
| SEA | Senior Enlisted Academy |
| SEA | Software Engineering of America (est. 1982) |
| SEA | Syrian Electronic Army (computer hackers) |
| SEA | Senior Executives Association |
| SEA | Service Excellence Award (various organizations) |
| SEA | Structural Engineers Association |
| SEA | State Employment Agency (various locations) |
| SEA | Scientists and Engineers for America (est. 2006) |
| SEA | Security Administrator |
| SEA | Special Education Administrator (various organizations) |
| SEA | Stock Exchange Announcement |
| SEA | Self Extracting Archive |
| SEA | Sociedad Entomologica Aragonesa (Spanish entomological society) |
| SEA | Swedish Energy Agency |
| SEA | Special Education Assistant |
| SEA | Students for Environmental Awareness (various schools) |
| SEA | Southern and Eastern Africa |
| SEA | Software Engineering and Applications |
| SEA | Self-Employment Assistance (Canada) |
| SEA | Senior Enlisted Advisor |
| SEA | Study English Abroad |
| SEA | Softsolutions Enterprise Administrator |
| SEA | Society of Equestrian Artists |
| SEA | SINR (Signal to Interference plus Noise Ratio) Exclusion Area |
| SEA | Sports and Exhibition Authority (Pittsburgh, PA) |
| SEA | Seafarers' Employment Agreement |
| SEA | Statistical Energy Analysis |
| SEA | Secretaria de Estado de Agricultura (Dominican Republic) |
| SEA | Supplier Excellence Alliance (Irvine, CA) |
| SEA | Societa' Esercizi Aeroportuali (airports of Malpensa and Linate, Milan, Italy) |
| SEA | Software and Engineering Associates (various organizations) |
| SEA | Software Engineers Association (Japan) |
| SEA | Suomen Elokuva-Arkisto (Finnish: Finnish Film Archive) |
| SEA | Selective Enforcement Audit |
| SEA | Seattle Education Association |
| SEA | Secondary Entrance Assessment (Trinidad and Tobago) |
| SEA | Swaziland Environmental Authority |
| SEA | Service des Essences des Armées (French: Military Fuel Service) |
| SEA | Soledad Enrichment Action |
| SEA | Society for Education in Anesthesia |
| SEA | Significant Ecological Area |
| SEA | Safety & Environmental Associates, Inc. (Little Rock, AR) |
| SEA | Secure Email Attachment |
| SEA | Student Educational Advancement (University of California, San Diego) |
| SEA | Society for Electronic Access |
| SEA | Science and Education Administration |
| SEA | Secure Extranet Appliance (SafeWeb) |
| SEA | State Economic Area |
| SEA | Single European Authorisation (customs scheme; EU) |
| SEA | Sensor Electronics Assembly (US NASA) |
| SEA | Science and Engineering Ambassador |
| SEA | Semiconductor Equipment Assessment |
| SEA | Supply Excellence Award (US Army) |
| SEA | Standard Extended Attribute |
| SEA | Systems Evaluation Area |
| SEA | State/EPA Agreement |
| SEA | St. Eustatius Alliance (Netherlands Antilles) |
| SEA | Service Educational Activities |
| SEA | Strategic Enterprise Architecture |
| SEA | Secure Extranet Architecture |
| SEA | Ships Editorial Association (US Navy) |
| SEA | State Education Authority |
| SEA | State External Affairs |
| SEA | Successive Elimination Algorithm |
| SEA | Scientist's Expert Assistant (NASA) |
| SEA | Simple and Efficient Algorithm |
| SEA | Sound Effect Amplifier (audio equipment) |
| SEA | Sea Echelon Area |
| SEA | Student Exchange Alliance (various locations) |
| SEA | Society of Egyptian Architects (Cairo, Egypt) |
| SEA | Symposium on Experimental Algorithms |
| SEA | Subsistence Expense Allowance |
| SEA | Side-Effect Analysis |
| SEA | State Enforcement Agreement |
| SEA | Suncoast Epilepsy Association, Inc. |
| SEA | Science Experience Abroad |
| SEA | Single-Element Antenna |
| SEA | Société d'Entomologie Africaine (French: Society of African Entomology; Belgium) |
| SEA | Safeway Employee' Association |
| SEA | Société Européenne d'Abrasifs (French: European Society of Abrasives) |
| SEA | Save the Environment Afghanistan |
| SEA | Seattle, WA, USA - Seattle Tacoma International Airport (Airport Code) |
| SEA | Systems Enhancement Associates |
| SEA | Ship/Equipment, Alterations |
| SEA | Strategic Enterprise Agreement |
| SEA | Siebel Enterprise Application (software) |
| SEA | Smart Ethernet Adapter |
| SEA | Support Electronics Assembly |
| SEA | Safety Engineering Agent |
| SEA | Seagate Enterprise Architecture |
| SEA | Survey on Economic Attitudes |
| SEA | Site Electrical Assessment |
| SEA | Systems Engineering Association |
| SEA | Société d'Editions Architecturales (French: Editions of the Architectural Society; trade publication) |
| SEA | Sudden Enhancement of Atmospheres |
| SEA | Sleeman Employee Association (Ontario, Canada) |
| SEA | Software Engineering Apprenticeship |
| SEA | Scanning Electrostatic Analysis (US NASA) |
| SEA | Simplified Email Address |
| SEA | Station d'Essais et d'Enalyses (French: Testing and Analysis Station) |
| SEA | Silicon Elastimeter Ablator (US NASA) |
| SEA | Space Engineers' Association (India) |