| Acronym | Definition |
|---|
| RCK | Rockford (Amtrak station code; Rockford, IL) |
| RCK | Radio Check |
| RCK | Returned Check |
| RCK | Regulator of Conductance of K+ (also seen as RCK1) |
| RCK | Roazhon Celtic Kop (French soccer club) |
| RCK | Remote Control Kit |
| RCK | Ramsey-Cass-Koopmans (economic model) |
| RCK | Royal Charoen Krung Tower (now State Tower; skyscraper; Bangkok, Thailand) |
| RCK | Rifle Cleaning Kit |
| RCK | Radio Club Kennemerland (Dutch radio club) |
| RCK | Rugby Club de Kourou (French rugby club) |
| RCK | Roller City Knights (French roller skating club) |
| RCK | Reverse Crescent Kick (karate) |