| Abbreviation | Definition |
|---|---|
| KNR | Korea Railroad |
| KNR | Korea Railroad Corporation |
| KO | Key Offroad |
| KOEO | Key On Engine Off |
| Korail | Korea Railroad Corporation |
| Korail | Korean National Railroad |
| KQ | Kenya Airways (airline code) |
| KR | Knock Retard |
| KR | Korea Railroad |
| KRO | Knight Reformulation One |
| KRS | Keep Richt Sign |
| KRS | Keep Right Sign |
| KSA | Killed or Seriously Injured |
| KSI | Killed Or Seriously Injured |
| KSL | Kowloon Southern Link |
| KSRTC | Karnata State Road Transport Corporation |
| KTAS | Knots True Air Speed |
| KTC | Kentucky Transportation Cabinet |
| KTC | Kentucky Transportation Center |
| KTC | Krakow Transportation Center |