| Acronym | Definition |
|---|
| GLASS | Globally Accessible Services |
| GLASS | GMPLS Lightwave Agile Switching Simulator |
| GLASS | Gay Lesbian and Straight Supporters |
| GLASS | Global Land Atmosphere System Study |
| GLASS | Georgia Library for Accessible Services |
| GLASS | Gay & Lesbian Adolescent Social Services |
| GLASS | Gay, Lesbian, and Allies Senate Staff Caucus |
| GLASS | Germanium Lithium Argon Scanning System |
| GLASS | Gay Lesbian and Straight Spectrum |
| GLASS | God Loves All Saints and Sinners (band) |
| GLASS | Great Lakes Area Spirit Society (Wisconsin) |
| GLASS | Generalized Lattice Analysis Subsystem |