DL, dL, or dl may stand for:
Science and technology
Electronics and computing , an HTML element used for a definition list Deep learning, a field of machine learning Description logics, a family of knowledge representation languages Delete Line (ANSI), an ANSI X3.64 escape sequence Digital library, a library in which collections are stored in digital formats Diode logic, a logic family using diodes DVD-R DL, a DVD Dual Layer engineering method DL register, the low byte of an X86 16-bit DX register Dynamic loading, a mechanism for a computer program to load a library
Telecommunications Data link, a computer connection for transmitting data Distribution list, a function of e-mail clients Downlink, the link from a satellite to a ground station Download, a transfer of electronic data
Vehicles Subaru DL, an automobile Australian National DL class, a class of diesel locomotives built by Clyde Engineering New Zealand DL class locomotive, a diesel-electric class built by Dalian Locomotive and Rolling Stock Company Destroyer leader, a large naval vessel capable of leading a flotilla
Other uses in science and technology ⟨dl⟩, a digraph; see List of Latin script digraphs. Dimensionless quantity (dl, in lower case), the 'per unit' system of measurement Decilitre (or deciliter, dL), a unit of measurement of capacity or volume Discrete logarithms, in mathematics Distance learning, Internet-based education HPE ProLiant DL, density line servers Dextrorotation and levorotation or D/L nomenclature, used in naming chemical compounds
Arts and entertainment D.L. (play), a Bulgarian play DL series, a series of adventures and some supplementary material for the Advanced Dungeons & Dragons role playing game D. L. Hawkins, fictional character on the American television series Heroes D. L. Hughley (born 1963), American actor and comedian Directors Lounge, an ongoing Berlin-based film and media-art platform and/or its annual film festival Dominant leittonwechselklänge
Business Dai-ichi Life, an insurance company Delta Air Lines (IATA airline code: DL) Pangdonglai, retail corporation in Xuchang, Henan, China
Railroads Delaware–Lackawanna Railroad in Pennsylvania, U.S. District line, a London Underground line
Places DL postcode area, Darlington, north-east England County Donegal, Ireland Delanggu railway station, a railway station in Indonesia (station code) Detroit Lakes, Minnesota, US
Politics Democracy is Freedom – The Daisy, a former political party in Italy Drinking Liberally, a social organization that discusses politics in bars Liberal Democracy (France) (Démocratie Libérale), a former political party in France Rights and Freedom, a political party in Italy
Sports Defensive lineman, an American/Canadian football player position Disabled list, the former name of the injured list, a list of injured baseball players Duckworth–Lewis method, a mathematical way to calculate the target score in cricket Deadlift, a powerlifting move Detroit Lions, a football team in the NFL Diamond League, track and field league
Other uses Deputy Lieutenant, a British title Diaper lover, a fetish Dimension Lengthwise, an International standard size of an envelope (110mm × 220mm, holds A4) Doctor of Letters, a university degree Down-low (disambiguation) Driver's license, an official document which states that a person may operate a motorized vehicle Number 550, in Roman numerals Sangihe and Talaud Islands (vehicle registration prefix DL)