| Acronym | Definition |
|---|
| KB | Knowledge Base |
| KB | Keyboard |
| KB | KiloByte (written with uppercase B; 1024 Bytes) |
| KB | Kilobit (written with lowercase b; 1024 bits) |
| KB | Kettlebell |
| KB | Keluarga Berencana (Indonesian: Family Planning) |
| KB | Koninklijke Bibliotheek |
| KB | Kobe Bryant (NBA player) |
| KB | Kick-Boxing |
| KB | Kate Bush (musician) |
| KB | Kaboom |
| KB | Kuala Belait (Brunei) |
| KB | Koninklijk Besluit |
| KB | Kilobase |
| KB | Kick Buttowski (cartoon character) |
| KB | Kickback (aka party) |
| KB | Kevin Bacon (actor) |
| KB | Kota Bahru (Kelantan capital) |
| KB | Kaufman and Broad (homebuilding; Los Angeles, CA) |
| KB | Kungliga Biblioteket (Swedish national library) |
| KB | Kleinbild (German for 24 mm x 36 mm photographic film format) |
| KB | Kookmin Bank |
| KB | KulturBolaget (Swedish venue) |
| KB | Komercni Banka (Czech Republic) |
| KB | Kuiper Belt |
| KB | King's Bench |
| KB | Kick & Ban |
| KB | Knee Brace (construction/engineering/architecture) |
| KB | Okay, Back |
| KB | Killing Blow (gaming) |
| KB | Kings Bay (Georgia) |
| KB | K Balachander |
| KB | Kleinwort Benson |
| KB | Kjøbenhavns Boldklub (Denmark) |
| KB | Ketone Body |
| KB | Kelly Bushing (Oil Industry) |
| KB | Knight of the Bath |
| KB | Knowledge Bowl |
| KB | Karnal Bunt (wheat fungus) |
| KB | Killer Bud (2001 movie) |
| KB | King's Bishop (chess) |
| KB | Kind Bud (marijuana strain) |
| KB | Kurtz Bros (Ohio) |
| KB | Koornbeurs (Delft) |
| KB | Koror-Babeldaob (bridge) |
| KB | Base Ionization Constant (aka base constant) |
| KB | Kahal B'raira |
| KB | Kirby Band (Nichols, NY) |
| KB | Koninklijke Bijenkorf |
| KB | Ukraine Karbovanets (national currency) |
| KB | Kew Band |