CHL

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Ice hockey

Canadian Hockey League (1975–present), the umbrella organization for Canadian major junior hockey
Central Hockey League, now the Central Canada Hockey League (1961–present), a Junior A ice hockey league
Champions Hockey League, an ice hockey tournament launched in the 2014–15 season
Kontinental Hockey League (2007–present), successor to the Russian Superleague, an international professional ice hockey league comprising teams from Russia and Europe

Central Hockey League (1925–1926), a Senior Amateur ice league hockey that operated in the United States and Canada
Central Hockey League (1931–1935), a minor professional ice hockey league that operated in the United States
Central Hockey League (1963–1984), a minor professional ice hockey league that operated in the United States
Central Hockey League (1992–2014), a minor professional ice hockey league that operated in the United States and Canada prior to merging with the ECHL
Champions Hockey League (2008–09), a short-lived ice hockey tournament
Coloured Hockey League (1894–1930), an all-black ice hockey league that operated in Nova Scotia
Colonial Hockey League (1991–1997), a minor professional ice hockey league in the United States and Canada, became United Hockey League

Chain Home Low, a radar system used by the British Royal Air Force during World War II
Chlorite, a group of phyllosilicate minerals
Chlorophyll, a pigment used by nearly all plants to absorb light for photosynthesis
Classic Hodgkin's lymphoma, cancer originating from white blood cells
Conductive hearing loss, a hearing disorder where there is a problem conducting sound waves through parts of the ear
Computational system for human language (C_HL), a concept proposed by Noam Chomsky under his Minimalist program

Centre Hospitalier de Luxembourg, the public-sector healthcare provider in Luxembourg City
China Mobile (New York Stock Exchange symbol, and on American Depository Receipts)

California Historical Landmark, a designation for historic sites in California, US
Chile (ISO 3166-1 3-letter country code CHL), a country in South America
Church History Library, a research center and archives building in Salt Lake City operated by the LDS Church
Clifton Hill railway station, Melbourne
Concealed Handgun License, a legal authorization to carry concealed handguns used in some US states
County Hall, London, in the United Kingdom