| Acronym | Definition |
|---|
| LAC | Library and Archives Canada |
| LAC | Los Angeles Clippers |
| LAC | Los Angeles County |
| LAC | Latin America and the Caribbean |
| LAC | Learning Assistance Center |
| LAC | Licensed Acupuncturist |
| LAC | Law-Abiding Citizen (band) |
| LAC | Latin American Countries |
| LAC | Laceration |
| LAC | Liberal Arts College |
| LAC | Loud and Clear (Cranberries song) |
| LAC | Local Authority Circular |
| LAC | Legislative Action Center |
| LAC | Los Alamos County (New Mexico) |
| LAC | L2TP Access Concentrator |
| LAC | Lupus Anticoagulant |
| LAC | Louisiana Administrative Code |
| LAC | Legal Assistance Centre (Namibia) |
| LAC | Local Area Coverage |
| LAC | Leading Aircraftman |
| LAC | Limits of Acceptable Change |
| LAC | Legislative Action Committee |
| LAC | Location Area Code (GSM cellular technology) |
| LAC | Local Advisory Committee |
| LAC | Looked After Child(ren) |
| LAC | Link Access Control |
| LAC | Labor Advisory Committee |
| LAC | Live and Active Cultures (yogurt) |
| LAC | Languages across the Curriculum (various schools) |
| LAC | L-Acetylcarnitine |
| LAC | Licensed Associate Counselor |
| LAC | Licensed Addictions Counselor |
| LAC | Lockheed Aircraft Corporation |
| LAC | Laboratory of Atmospheric Chemistry |
| LAC | Large Animal Clinic |
| LAC | Light Attack Craft (David Weber's Honor Harrington series) |
| LAC | Legislation Advisory Committee (Ministry of Justice; New Zealand) |
| LAC | Long Arm Cast (cast immobilizing wrist and elbow) |
| LAC | Liberian Agricultural Company |
| LAC | Leading Air Cadet (Royal Air Cadets) |
| LAC | Leisa Atmospheric Corrector |
| LAC | Local Agency Check |
| LAC | Loop Assignment Center |
| LAC | Latest Acquisition Cost |
| LAC | London Aquatic Club |
| LAC | Left Antecubital (IV site) |
| LAC | Lotus Authorized Consultants |
| LAC | Laboratory Advisory Committee |
| LAC | Local Assigned Code |
| LAC | Lettres, Arts et Cinéma (French: Letters, Arts and Film) |
| LAC | Load Accumulator |
| LAC | Local Area Controller |
| LAC | Low Authority Control |
| LAC | Launch Area Coordinator (TLAM) |
| LAC | Low Ambient Control (air temperature) |
| LAC | Livestock Advisory Committee |
| LAC | Local Area Communication |
| LAC | Lights Advisory Committee (sea navigation) |
| LAC | Licensed Asbestos Consultant |
| LAC | Loomis Armored Car |
| LAC | License Agreement Code |
| LAC | Living Architecture Centre |
| LAC | Limited Access Control (Interstate and major highway operation system) |
| LAC | Local Access Communications (Washington state) |
| LAC | Linear Amplifier Circuit |
| LAC | Light Armor Company |
| LAC | Lanao Agricultural College |
| LAC | Low Altitude Cruise |
| LAC | Large Anechoic Chamber |
| LAC | Laboratory Academic Committee (China) |
| LAC | Lemon Administration Committee |
| LAC | Local Access Carrier |
| LAC | Liga Antituberculosos Colombiana (Colombian anti-Tuberculosis League) |
| LAC | Layer 2 Aggregation Concentrator (Hekimian) |
| LAC | Launch Azimuth Corridor |
| LAC | Lifetime Authorization Cards |
| LAC | Little American Car |
| LAC | Livi Away Crew (UK) |
| LAC | Liceo Aplicado en Computación (Spanish; Guatemalan school) |
| LAC | Leadership Advisory Committee (various organizations) |
| LAC | Language and Cognition (various organizations) |
| LAC | Labor Advisory Council (various locations) |
| LAC | Lakeshore Athletic Club (Chicago, IL) |
| LAC | Living Arts Centre (Canada) |
| LAC | Library Advisory Commission (California) |
| LAC | Local Arrangements Committee (various organizations) |
| LAC | Linux Audio Conference (computing) |