Still-air temperature that would have the same cooling effect on exposed skin as a given combination of temperature and wind speed. As the wind speed increases, the wind chill equivalent temperature decreases; e.g., an air temperature of 30 °F (–1.1 °C) with a wind speed of 20 mph (32.2 kph) produces a wind chill of 17 °F (–8 °C). Wind chill is often included in weather reports to describe how cold it feels.

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Chill may refer to:

• Chill (role-playing game)
• CHILL programming language
• Chill (radio station), a British digital radio station
• Chill (song), a song by the Finnish rock band The Rasmus
• CHILL (library consortium), a consortium of health libraries in London
• Akhenaton (rapper), a French hip hop artist who uses Chill as one of his aliases
• Chill (video game), a Snowboarding video game for PlayStation One released by Eidos
• Chill (Beanie Baby), a Beanie Baby penguin produced by Ty, Inc. in 2008
• Chill out (music), a style of electronic music
• Chill (foundry), an object placed in a mold to (locally) increase the solidification rate of a casting
• Rigor (medicine) that occur during high fevers as a result of immune response to disease
• The Chill, a bandit group of hobgoblins in the computer game Baldur's Gate
• Joe Chill, a character in the Batman series attributed with the murder of Bruce Wayne's parents.
• Chilling effect, a situation where speech or conduct is suppressed or limited by fear of penalization. Also known as "Libel chill".
• MC Chill, rapper and producer from hip hop group, Compton's Most Wanted.