| 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) |