| Acronym | Definition |
|---|
| LLL | L-Size X 3 (Triple Large) |
| LLL | Live & Let Live |
| LLL | La Leche League |
| LLL | L-3 Communications (stock symbol) |
| LLL | Long Lost Love |
| LLL | Lower Left Lid |
| LLL | Life Long Learning |
| LLL | Lifelong Language Learning |
| LLL | Live Linux List |
| LLL | Living Like Larry (Spongebob Squarepants) |
| LLL | Left Lower Lobe (lung) |
| LLL | Low Level Laser |
| LLL | Live Love Laugh |
| LLL | Learning Language in Logic (workshop) |
| LLL | Lutheran Laymen's League |
| LLL | Long, Long, Long (Beatles song) |
| LLL | Lawrence Livermore Laboratory |
| LLL | Location, Location, Location |
| LLL | Low Light Level (camera) |
| LLL | Low Location Lighting |
| LLL | Low Level Language |
| LLL | Live Laugh Learn (various organizations) |
| LLL | Low-Level Light |
| LLL | Lenstra, Lenstra, and Lovasz (lattice reduction algorithm) |
| LLL | Legal Lending Limit (banking) |
| LLL | Licentiate of Law |
| LLL | Loony Liberal Left |
| LLL | Language, Linguistics and Literature (education) |
| LLL | Live Life Loud (Charlbury, Oxfordshire, UK festival) |
| LLL | Late Life Lesbian |
| LLL | Low-Level Logic |
| LLL | Low Liquid Level |
| LLL | Liquid-Like Layer (ice) |
| LLL | Longer Letter Later (on the end of a note) |
| LLL | Light, Life and Love (mysticism) |
| LLL | Live Life Large |
| LLL | Leiden Law Library (Netherlands) |
| LLL | Logistics Lesson Learned |
| LLL | Leased Long Line |
| LLL | Limited Loss Liability |
| LLL | Loyal Lusitanian Legion (Peninsular War) |
| LLL | Longitudinal Level of the Lesion (neurology) |
| LLL | Lessons Learned Line |