| Acronym | Definition |
|---|
| LEI | Legal Entity Identifier (international financial transactions) |
| LEI | Lack of Effective Implementation (aviation industry safety auditing) |
| LEI | Leading Economic Indicators |
| LEI | Landbouw Economisch Instituut (Dutch: Agricultural Economics Research Institute) |
| LEI | Lotus Enterprise Integrator (IBM Lotus Notes) |
| LEI | Lembaga Ekolabel Indonesia (Indonesian: Indonesian Ecolabelling Institute) |
| LEI | Low External-Input (agricultural technology) |
| LEI | Learning, Earning and Investing |
| LEI | Leading Edge Inflatable (kitesurfing kite) |
| LEI | Live Electro-Optic Imaging (physics) |
| LEI | Legal Expense Insurance (UK) |
| LEI | Law Enforcement Investigator |
| LEI | Laser Enhanced Ionization |
| LEI | Almeria, Spain - Almeria (Airport Code) |
| LEI | Law Enforcement Inquiry |
| LEI | Leadership Effectiveness Inventory |
| LEI | Leadership Educators Institute (various organizations) |
| LEI | Life Events Inventory |
| LEI | Last Equivalent Increase |
| LEI | Language Education Institute (Seoul National University, Korea) |
| LEI | Life Energy Intelligence (clothing brand) |
| LEI | Lower-Extremity Injury |
| LEI | Low Endoatmospheric Interceptor (US DoD) |
| LEI | Lafayette Entertainment Initiative (Louisiana) |