| Acronym | Definition |
|---|
| GLAS➣Gay Lesbian and Straight (various locations) |
| GLAS➣Giugno, Luglio, Agosto, Settembre (Italian: June, July, August, September; band) |
| GLAS➣Gay and Lesbian Arabic Society |
| GLAS➣Grade-Level Achievement Standards (various organizations) |
| GLAS➣General Ledger Accounting System |
| GLAS➣Gust-Load Alleviation System |
| GLAS➣Goddard Laboratory of Atmospheric Sciences |
| GLAS➣Geosciences Laser Altimeter System |
| GLAS➣Giggling Like A Schoolgirl |