SL may refer to:
Slovakia (; Slovak: Slovensko [ˈsloʋensko]), officially the Slovak Republic (Slovak: Slovenská republika, listen ), is a landlocked country in Central Europe.
Slovenia ( sloh-VEE-nee-ə; Slovene: Slovenija [slɔˈʋèːnija]), officially the Republic of Slovenia (Slovene: Republika Slovenija , abbr.: RS), is a nation state in southern Central Europe, located at the crossroads of main European cultural and trade routes.
Slavery is, in the strictest sense of the term, any system in which principles of property law are applied to people, allowing individuals to own, buy and sell other individuals, as a de jure form of property.
Slipknot is an American heavy metal band from Des Moines, Iowa. The band was founded in September 1995 by percussionist Shawn Crahan and drummer Joey Jordison.
Slavs are the largest Indo-European ethno-linguistic group in Europe. They are native to Central Europe, Eastern Europe, Southeastern Europe, Northeastern Europe, North Asia and Central Asia.
Sleep paralysis is a phenomenon during which an individual is unable to move during falling asleep or awakening, but is aware of their surroundings.
Sleep is a naturally recurring state of mind and body characterized by altered consciousness, relatively inhibited sensory activity, inhibition of nearly all voluntary muscles, and reduced interactions with surroundings.
Sleep apnea, also spelled sleep apnoea, is a sleep disorder characterized by pauses in breathing or periods of shallow breathing during sleep.