| Acronym | Definition |
|---|
| K | King (playing cards, chess) |
| K | Black (in CMYK color space) |
| K | Kindergarten (as in K-12) |
| K | Kelvin (thermodynamic temperature scale) |
| K | Kosher (symbol on food labels) |
| K | Kilo- (thousand) |
| K | Kalium (Potassium) |
| K | OK/Okay |
| K | Special K (cereal) |
| K | Over (logging abbreviation) |
| K | Que (Spanish) |
| K | Knowledge |
| K | Contract |
| K | Kritik (German: critique) |
| K | Killer (type of white blood cell) |
| K | Okay |
| K | Capital (economics) |
| K | K-Mart (store) |
| K | Carrying Capacity (population studies) |
| K | Kerry (Irish car registration) |
| K | Cologne (auto license plate) |
| K | Key Generator |
| K | Knot |
| K | Kirby |
| K | Eastern Ontario (postal code designation, Canada) |
| K | Kompressor (band) |
| K | Kappa (receptor) |
| K | Kicker (football) |
| K | Karat |
| K | Conductivity |
| K | Curvature |
| K | Lysine (amino acid) |
| K | Permeability (physics) |
| K | Cathode (electronics) |
| K | Ketamine (animal tranquilizer/disassociative) |
| K | Kilobyte |
| K | Strikeout |
| K | Korpus (Russian, building; used in postal addresses) |
| K | Knit Stitch |
| K | Kerrang! (British Magazine and TV Channel) |
| K | Phylloquinone (vitamin) |
| K | K Language (Unix-Based programming language) |
| K | Kell Blood Group |
| K | Key/Black (printing ink in CMYK model) |
| K | Boltzman Constant |
| K | Coefficient of Thermal Conductivity |
| K | Kilohm (unit of electrical resistance; also seen as Kiloohm) |
| K | Kiloohm (resistor; electronics schematics) |
| K | Ludwig von Köchel (publisher of catalog of the works of Wolfgang Amadeus Mozart) |
| K | Klebsiella Pneumoniae Serotype |
| K | Federal Reserve Bank of Dallas, Texas (designates original point of circulation of a dollar bill) |
| K | Keratometric Reading (contact lens fitting term) |
| K | Kellogg's Corp (stock symbol) |
| K | Confidential Cryptographic (TMINS) |
| K | US Offices in China Stamp (Scott Catalogue prefix; philately) |
| K | Tanker Aircraft Designation (US military, as in KC-10) |
| K | Wreck Less Than $50 Damage (Alabama Public Safety radio code) |