'Klick' (sometimes spelled 'click', which may also mean one
minute of arc when adjusting the sighting system on a weapon such as a
rifle) is a common military term meaning
kilometer when referring to distance or
kilometers per hour (
km/h) when referring to speed. Its use became popular among soldiers in
Vietnam during the 1960s, although
veterans of the war recall its usage as early as the 1950s.
The term is of unknown origin. It is most likely an example of
condensed pronunciation or
contraction of the term
kilometer, although other theories exist.
The term is also used by civilians, often in reference to highway distances and speeds.
External links
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Concise definition
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Alternative theory