| Acronym | Definition |
|---|
| E | Email |
| E | East |
| E | Enlisted (military) |
| E | Ecstasy (3,4-Methylenedioxy Methamphetamine, MDMA) |
| E | base for the natural logarithm; approximately 2.71828 |
| E | Even (par; golf) |
| E | Special Delivery (Scott Catalogue prefix; philately) |
| E | Estate (IRB) |
| E | Enterprise (Rent-A-Car) |
| E | Electronic |
| E | Extra (as in extra fine) |
| E | London East (postcode, United Kingdom) |
| E | Entertainment Television |
| E | Everyone (ESRB) |
| E | established |
| E | Earth |
| E | Edge (welded joint type) |
| E | Energy |
| E | Explorer (Microsoft) |
| E | Euro (European currency) |
| E | Error |
| E | Empty |
| E | Existing |
| E | Electrical |
| E | Enable |
| E | Ear |
| E | Enhanced (911 service) |
| E | Electrical Field (physics) |
| E | Element |
| E | Exposure Level |
| E | Endangered (species classification) |
| E | Eminem (rapper) |
| E | Engineer |
| E | Excellence (Navy award given to ships or units for top performance) |
| E | Echo |
| E | Electricity |
| E | Volt (electronics) |
| E | Earl (British title of nobility) |
| E | New Brunswick (Canada Post designation) |
| E | Failing Grade (used instead of or in addition to F) |
| E | Electra (Records) |
| E | Expectation (mathematics; probability theory) |
| E | Enlightenment |
| E | Electron |
| E | Energizer (battery) |
| E | Equilibrium (economics) |
| E | European Route (European interstate) |
| E | Espana (Spain) (International Auto Identification) |
| E | Entgegen |
| E | Expulsion |
| E | Exa- (10^18, SI Prefix) |
| E | Eni Spa (stock symbol) |
| E | Exchequer (UK) |
| E | Young's Modulus (of elasticity) |
| E | Eccentricity |
| E | Escherichia (genus of the E. coli bacterium) |
| E | Tocopherol Acetate (vitamin) |
| E | Emitter (transistor; electronics) |
| E | Glutamate (amino acid) |
| E | Enron Corp. |
| E | Erlang (telephone traffic analysis) |
| E | Enlisted Man |
| E | Epinephrine (adrenaline) |
| E | Electromotive Force (voltage) |
| E | Emissivity |
| E | Exponentiation |
| E | Ethambutol |
| E | Electronic/Electronics (US military aircraft designation; as in E-3A) |
| E | Epoxy Coated Rebar (also seen as ECR) |
| E | Estimated Sign (European packaging) |
| E | Federal Reserve Bank of Richmond, Virginia (designates original point of circulation of a dollar bill) |
| E | Have Directed Traffic (Alabama Public Safety Radio Code) |
| E | Total probable error |
| E | Special Electronic Installation (US Military aerospace mission designation) |
| E | Esophoria at Distance |
| E | Undenominated United States Stamp (25 cents, introduced 3 Apr 1988) |
| E | Electronic Night Bombing Installation (US Navy) |