| Acronym | Definition |
|---|
| COK | Compassion Over Killing (nonprofit animal advocacy organization; Washington, DC) |
| COK | Cook Islands (ISO Country code) |
| COK | Children of the Korn |
| COK | County of Kauai (Hawaii) |
| COK | Center for Offentlig Kompetenceudvikling (Danish: Center for Government Skills) |
| COK | Council of Knights (gaming) |
| COK | Conditionally OK |
| COK | Cochin, India - Naval Air Station (Airport Code) |
| COK | Champions of Kamigawa (Magic the Gathering set) |
| COK | Cologne Outdoor Killers (gaming clan) |
| COK | Clash of Kings (George RR Martin book) |
| COK | City of Kamloops (Canada) |
| COK | Church of Karameikos (fictional, Dungeons & Dragons) |