| Acronym | Definition |
|---|
| NTL | Nevertheless |
| NTL | No Time Limit (permit; UK) |
| NTL | Non-Trucking Liability (insurance) |
| NTL | Northwest Transmission Line (Canadian project) |
| NTL | National Transportation Library |
| NTL | National Training Laboratories |
| NTL | Nothing to Lose |
| NTL | None the Less |
| NTL | Naigai Trans Lines (Indonesia) |
| NTL | Normal Tidal Limit |
| NTL | Norsk Tjenestemannslag |
| NTL | National Training Laboratory |
| NTL | Never Too Late |
| NTL | Newton's Third Law (physics) |
| NTL | Norske Tropefuglforeningers Landsforbund (Norwegian bird association) |
| NTL | Number Theory Library |
| NTL | Nippon Techno Lab, Inc. (Japan) |
| NTL | National Taichung Library (est. 1923; Taiwan) |
| NTL | National Transcommunications Limited (UK television & media) |
| NTL | Natural Law Party (also seen as NLP) |
| NTL | National Testing Laboratory (Red Cross) |
| NTL | No Time Lost |
| NTL | National Travelers Life Company (now EMC National Life Company) |
| NTL | Notice to Lessees and Operators |
| NTL | NonStop Technical Library (Hewlett-Packard) |
| NTL | Newcastle, New South Wales, Australia - Williamtown (Airport Code) |
| NTL | Need the Loo |
| NTL | National Technology Laboratory |
| NTL | National Temperance League |
| NTL | Nizky Tlak (Czech: Low Pressure) |
| NTL | Nuclear Technology Laboratory |
| NTL | Notified Testing Laboratory |
| NTL | Nonstandard Template Library (C++ programming) |
| NTL | National City Lines, Inc. (NYSE symbol) |
| NTL | Non-Uniform Transmission Line |
| NTL | Neon Test Light |
| NTL | Nuclear Thermionics Laboratory |
| NTL | Non Technological Liability |