| Acronym | Definition |
|---|
| LTA | Land Transport Authority |
| LTA | Land Trust Alliance |
| LTA | Lawn Tennis Association |
| LTA | Lighter-Than-Air |
| LTA | Lipoteichoic Acid |
| LTA | Lieutenant (Singapore military) |
| LTA | Long Term Archiving |
| LTA | Lifetime Achievement (Award) |
| LTA | La Tenes Adentro (Spanish: The Inside Tenes) |
| LTA | Long Term Agreement |
| LTA | Lifetime allowance |
| LTA | Lost Time Accident |
| LTA | Long Term Average |
| LTA | Library Technical Assistant |
| LTA | Lymphotoxin-Alpha |
| LTA | Lambda Theta Alpha (sorority) |
| LTA | Lettre de Transport Aérien (French: Airway Bill; transport industry) |
| LTA | Less Than Adequate |
| LTA | Local Training Area |
| LTA | Lesotho Telecommunications Authority (now Lesotho Communications Authority) |
| LTA | Lower Torso Assembly (space suit) |
| LTA | Leave Travel Allowance |
| LTA | Leukotriene Antagonist (drug) |
| LTA | Logistics Transformation Agency |
| LTA | Life Threatening Allergy |
| LTA | Last Time Around |
| LTA | Local Taxpayer Advocate (US IRS) |
| LTA | Long Term Assignment |
| LTA | Lead Test Assembly |
| LTA | Little Tunny (FAO fish species code) |
| LTA | Limited Term Appointment (university faculty) |
| LTA | Lost Ticket Application (aviation financial term) |
| LTA | Learning Through Action (UK) |
| LTA | Local Thermal Analysis |
| LTA | Local Training Authority (Navy/CNET) |
| LTA | Learning Through Action (UK charity) |
| LTA | Local Traffic Authorities (UK Highways Agency) |
| LTA | Like Totally Awesome |
| LTA | Limited Technical Assessment |
| LTA | Life Threatening Arrhythmia |
| LTA | Louisiana Telecommunications Association |
| LTA | LEM Test Article |
| LTA | Least Interference-Below-Threshold Algorithm |
| LTA | Lead Trial Attorney |
| LTA | Lackland Training Area |
| LTA | Link-Traffic Analysis |
| LTA | Local Target Area |
| LTA | Landbased Technician Accreditation |
| LTA | Low Threat Area |
| LTA | Load-Transfer-Acknowledgment Signal (ITU-T) |
| LTA | Learning and Teaching Assistant (UK) |
| LTA | Liberty City Transport Authority (gaming, Grand Theft Auto IV) |
| LTA | Local Trace Assertion |
| LTA | Lifetime Alignment (automotive service) |
| LTA | Lumenare Test Automation |
| LTA | Low Temperature Aftercooler (engine cooling system) |
| LTA | Long Thin-Line Array |
| LTA | Letter to America (podcast) |
| LTA | Long Term Agricultural (zoning) |
| LTA | Licensed Travel Agency (various locations) |