| Acronym | Definition |
|---|
| SLN | Special Local Need |
| SLN | Sentinel Lymph Node |
| SLN | SUNY (State University of New York) Learning Network |
| SLN | Science Learning Network |
| SLN | Sri Lanka Navy |
| SLN | Straight Line |
| SLN | Sign Language Network |
| SLN | Solution File |
| SLN | Slovene (linguistics) |
| SLN | Société Métallurgique le Nickel (French: Nickel Smelting Company) |
| SLN | Superior Laryngeal Nerve |
| SLN | Submandibular Lymph Nodes |
| SLN | Visual Studio .net Solution (Visual Studio File Type) |
| SLN | SYBYL Line Notation (notation for organic structures) |
| SLN | Senior Lending Network (reverse mortgages) |
| SLN | Saskatchewan Literacy Network (Canada) |
| SLN | School Library Network |
| SLN | Salina, KS, USA - Salina Municipal (Airport Code) |
| SLN | Student Loan Network (Quincy, MA) |
| SLN | Solarian League Navy (Honor Harrington science fiction novels) |
| SLN | Simple Living Network |
| SLN | Sequence Line Number |
| SLN | Spirit Links Newsletter |
| SLN | Subscriber Line Number (last 4 digits of a phone number) |
| SLN | Sports et Loisirs Nautiques (French: Sports and Water Sports; Coudoulière, France) |