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Wiktionary
k-4

alt. (context canoeing English) A class of canoe for four seated people. sym. (context canoeing English) A class of canoe for four seated people.

Wikipedia
K-4 (Kansas highway)

K-4 is the longest designated state highway in Kansas traversing from north of Scott City at US-83 to US-59 near Nortonville in northeast Kansas. A segment of the highway in Saline County overlaps Interstate 135, and a section in Topeka runs concurrent with Interstate 70.

K-4 (SLBM)

K-4 is a nuclear capable Intermediate-range submarine-launched ballistic missile under development by Defence Research and Development Organisation of India to arm the Arihant-class submarines. The missile has a reported effective range of over 3500 km.

Usage examples of "k-4".

The relatively small (by Bug standards, at least) population of the K-4 star's innermost planet was far too tiny to have supported such an attack .