Hack may refer to:

• Hack (technology), a term used in the technology and computer science fields
• Hack (masonry), a row of stacked unfired bricks protected from the rain
• Hack writer, a writer who is paid to write low-quality, quickly put-together articles or books
• Hack (comedy), a joke, or premise for a joke, that is considered obvious, frequently used, and/or stolen.
• Hack and slash, a genre of video game or a type of gameplay
• Life hack, productivity techniques used by programmers
• Roof and tunnel hacking, unauthorized exploration of roof and utility tunnel spaces
• What the Hack, a hacker conference held in Liempde, The Netherlands
• .hack, a Japanese multimedia franchise
• Hack Circle, an amphitheatre in Christchurch, New Zealand referred to as "Hack"
• ROM hacking, the process of modifying a video game's program image
• Show hack, a type of show horse
• MIT hack, a clever, benign, and ethical prank or practical joke at the Massachusetts Institute of Technology
• Political hack, an term for somebody who devotes him/herself to party-political machinations.

In mass media:

• Hack (TV series), a CBS television series
• Hack (video game), a roguelike computer game
• Hack (album), a 1990 album by Information Society
• Hack (radio program), a current affairs program on Australian radio network Triple J
• Hacks (film), a 1997 film starring Stephen Rea
• Hack! (film), a 2007 film starring Danica McKellar

Hack may also be:

• Casual riding or equestrianism, or a common, ordinary horse used for such purposes
• A goal in a game of Hacky Sack, or the footbag circle kicking game
• American slang for a cab driver or a taxi
• A piece of equipment used for traction in the sport of curling
• A position in curling called "in the hacks"
• A slang term for a caboose
• Hack (falconry)
• Slang for coughing

See also:

• Hacker
• Hacking

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