Hack has a number of meanings, some related:

• Hack is a slang term in technology culture which has a number of meanings depending on context, including a joke, a progamming exploit, or a commercial software break-in.
• A hack writer, is a writer for hire, paid to express others' thoughts and opinions. In British English, it also refers to Journalists of dubious talent.
• In politics, a party hack is a derogatory term for someone of little or no competence, who is given a post because of party loyalty.
• A horse , especially an old and tired one, used for driving or riding; sometimes one such for hire.
• A hack is slang for a taxicab, or by derivation the driver thereof (from a shortened form of hackney carriage).
• Hack, a roguelike computer game (ASCII graphics)
• Hack , a CD by Information Society
• Hack , the Triple J current affairs radio program
• Hack , a television series on CBS
• Roof and tunnel hacking is a form of urban exploration, mostly at educational institutions.
• Hack can also refer to the goal of the game hacky sack.
• A hack is a piece of equipment in curling. See curling.
• Project .hack, a multimedia franchise.
• A clam hack , a small spading fork with a short, bent handle used to harvest clams.