| Acronym | Definition |
|---|
| BLK | Black |
| BLK | Blank |
| BLK | Block |
| BLK | Bulk |
| BLK | BlackRock, Inc. (stock symbol; New York, NY) |
| BLK | Beyond Limits Known (sportswear; various locations) |
| BLK | Bund Länder Kommission für Bildungsplanung und Forschungsförderung (German: Bund-Länder Commission for Educational Planning and Research Promotion; est. 1970) |
| BLK | Blocked Shot (basketball) |
| BLK | Block Template File |
| BLK | Blocked Kick (football) |
| BLK | Blackpool, England, United Kingdom - Blackpool (Airport Code) |
| BLK | Bielska Liga Koszykowki (Polish basketball league) |