Prefix
In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 1,000. Symbol: k
(computing) Multiplying the unit to which it is attached by 2 (1024)
Source: en.wiktionary.orgFor example, kilo- denotes a multiple of a thousand and milli- denotes a multiple of a thousandth, so there are one thousand millimetres to the metre and one thousand metres to the kilometre. Source: Internet
Number The SI prefix for a thousand is kilo-, officially abbreviated as k—for instance, prefixed to "metre" or its abbreviation m, kilometre or km signifies a thousand metres. Source: Internet
For example, some characters were produced as regular compounds for some (but not all) SI units, such as 粁 main (米 "meter" + 千 "thousand, kilo-") for kilometer – see Chinese characters for SI units for details. Source: Internet