KO
| Acronym | Definition |
|---|---|
| KO | Knock Out |
| KO | Kick Off |
| KO | Knight Online (MMORPG) |
| KO | Coca-Cola Company (stock symbol) |
| KO | Keith Olbermann (television broadcaster) |
| KO | Konkursordnung (German: Bankruptcy Act) |
| KO | Contracting Officer |
| KO | Keystone Oaks (High School, Pennsylvania) |
| KO | Kilo Octet |
| KO | Kyle Orton (football player) |
| KO | Knowledge Object (knowledge management) |
| KO | Kemetic Orthodoxy |
| KO | Knight Officer |
| KO | Kashikawa and Okamura (astronomy) |
| KO | Kelly Ordnance (ammunition headstamp - .50 Caliber) |