| Acronym | Definition |
|---|
| GLAC➣Glacier National Park (US National Park Service) |
| GLAC➣Germanic Linguistics Annual Conference (various locations; Society for Germanic Linguistics) |
| GLAC➣General Ledger Account Code |
| GLAC➣Greater Los Angeles County |
| GLAC➣Glenbrook Life and Annuity Company |
| GLAC➣God Loves a Challenge (band) |
| GLAC➣Gladstone Little Athletic Centre (QLD, Australia) |