| Acronym | Definition | 
|---|
| LEC➣Local Exchange Carrier (telephony) | 
| LEC➣Lake City (Amtrak station code; Lake City, FL) | 
| LEC➣Lake Erie College | 
| LEC➣LAN Emulation Client | 
| LEC➣League of Legends European Championship | 
| LEC➣Liberia Electricity Corporation (Liberia) | 
| LEC➣Little East Conference (athletics) | 
| LEC➣Limited Editions Club (est. 1929; books) | 
| LEC➣Line Echo Cancellation | 
| LEC➣Lens Epithelial Cell (ophthalmology) | 
| LEC➣Local Exchange Carrier | 
| LEC➣Linux Education Center | 
| LEC➣Local Exchange Companies | 
| LEC➣Logan Entertainment Centre (Australia) | 
| LEC➣Law Enforcement Committee | 
| LEC➣Living Enrichment Center (Oregon) | 
| LEC➣Language Engineering Company (translation software) | 
| LEC➣Laredo Entertainment Center (Laredo, TX) | 
| LEC➣Levy Exemption Certificate (UK) | 
| LEC➣Lawrence Education Center (Springfield, IL) | 
| LEC➣Local Emergency Coordinator | 
| LEC➣Long Evans Cinnamon (rat species) | 
| LEC➣LucasArts Entertainment Company LLC (computer game company) | 
| LEC➣Landmark Education Corporation | 
| LEC➣Law Enforcement Command | 
| LEC➣Lodge Executive Committee Meeting (Order of the Arrow, Tamegonit Lodge 147, Heart of America Council, Boy Scouts of America) | 
| LEC➣Locally Employed Civilian | 
| LEC➣London European Club (London, UK) | 
| LEC➣Library Executive Committee | 
| LEC➣Language Engineering Company, LLC (Belmont, Massachusetts) | 
| LEC➣Local Engineering Competition (Board of European Students of Technology; Aalborg University; Denmark) | 
| LEC➣Layered Error Correction | 
| LEC➣Lafayette Engine Center (Caterpillar; Indiana) | 
| LEC➣Longford Engineering Company (refrigeration; UK) | 
| LEC➣Longford Engineering Company (UK) | 
| LEC➣LAN (Local Area Network) Emulation Configuration (servers) | 
| LEC➣Lightning Eliminators Consultants (Colorado) | 
| LEC➣Linear Expression Cassette (genes) | 
| LEC➣Lockheed Electronics Company | 
| LEC➣Liquid Encapsulated Czochralski Method (semiconductors) | 
| LEC➣Lunar Equipment Conveyor | 
| LEC➣Low Emissions Combustion | 
| LEC➣Local Employment Committee | 
| LEC➣LAMPS Element Coordinator | 
| LEC➣Levelised Electricity Costs (power plants) | 
| LEC➣Liquid Encapsulated Czochralsky (crystal growth method) | 
| LEC➣Local Engineering Change | 
| LEC➣Light Earth Construction (building) | 
| LEC➣Laboratory Emergency Coordinator | 
| LEC➣Link Edit Control | 
| LEC➣Logical Equivalence Check (engineering, electronics, design automation, formal verification) | 
| LEC➣Least Economic Countries | 
| LEC➣Launch Escape Control | 
| LEC➣LANTCOM ELINT Center | 
| LEC➣Lafayette Educational Complex (Brooklyn, NY) | 
| LEC➣London Euston Crewe (UK engineers line reference) | 
| LEC➣Lumped Element Circulator | 
| LEC➣Livestock Equipment Council | 
| LEC➣Learner's Edge Consulting | 
| LEC➣Leading Edge Consulting, LLC |