street name for synthetic cannabinoids C/2017 K2, a non-periodic comet Haplogroup K2, human group sharing a Y-chromosome characteristic, a.k.a. haplogroup T Vitamin K2 Kardashev-2, a hypothetical civilization that uses all of the energy emitted by a star Structures K2 (building), a residential & commercial building in Leeds, United Kingdom K2 Leisure Centre, a sports centre in Crawley, West Sussex Transportation K-2 (Kansas highway) K2, a two-seater Sprint kayak Eurolot, IATA code K2 Furness Railway K2, a 4-4-0 steam locomotive class LNER Class K2, a class of British steam locomotives GSR Class K2, a class of Irish 2-6-0 steam locomotives London Buses route K2, a Transport for London bus route PRR K2, a Pennsylvania Railroad locomotive classification Tatra K2, a 1966 Czechoslovakian articulated tramcar Trekking K2, a French mountain descent paraglider design Other uses K2 (tax scheme), a Jersey tax avoidance scheme K2, a version of the red telephone box in the UK K2 League, a Korea league for association football See also KATU, an ABC affiliate assigned to Portland, Oregon KTOO (disambiguation) KTWO (disambiguation)