noun

• Clipping of kilogram. [In the International System of Units, the base unit of mass; conceived of as the mass of one litre of water, but now defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10⁻³⁴ when expressed in units of kg⋅m²⋅s⁻¹. Symbol: kg]
• (international standards) Alternative letter-case form of Kilo from the NATO/ICAO Phonetic Alphabet.