| Acronym | Definition |
|---|
| PLL | Phase-Locked Loop |
| PLL | Parts List (TMINS) |
| PLL | Polskie Linie Lotnicze (Polish Airways) |
| PLL | Pretty Little Liars (TV show) |
| PLL | Prolymphocytic Leukemia |
| PLL | Posterior Longitudinal Ligament |
| PLL | Physical Link Layer (Optical Internetworking Forum) |
| PLL | Partia Lëvizja e Legalitetit (Movement of Legality Party, Albania) |
| PLL | Potential Loss of Life (risk assessment) |
| PLL | Phase Locked Loop |
| PLL | Preselection List Length |
| PLL | Prima Logic Language |
| PLL | Pre Linked Library |
| PLL | Pollution Legal Liability |
| PLL | People's Law Library (Maryland) |
| PLL | Peace, Love & Light |
| PLL | Permute Last Layer (Rubik's Cube) |
| PLL | Permutation of the Last Layer (Rubik's Cube) |
| PLL | Prelinked Library (File Name Extension) |
| PLL | Passenger Legal Liability (insurance) |
| PLL | Process Liquid Level |
| PLL | Parameter List Length |
| PLL | Product Literature Library (Eaton) |
| PLL | Plasma Lock Load |
| PLL | Permanent Logical Link |
| PLL | Precision Lighting Ltd. (UK) |
| PLL | Programmatic Lessons Learned |
| PLL | Parts Load List |
| PLL | Prescribed Load Listing |
| PLL | Preliminary Load List |
| PLL | Production Load List (US Army) |
| PLL | Primary Load List (US DoD) |