OCK
| Acronym | Definition |
|---|---|
| OCK | over Clocking Kit |
| OCK | Ottawa Chito Kai (martial arts; Canada) |
| OCK | OverCast Kid |
| OCK | Ostrzeszowskie Centrum Kultury (Polish: Ostrzeszów Cultural Center; Poland) |
| OCK | Orange County Kodokan (Cypress, CA) |
| OCK | Order of the Cavendish Knot |
| OCK | Oleckie Centrum Kultury (Polish: Oleckie Cultural Center; Mazowieckie, Poland) |