• Donkey or ass, Equus africanus asinus
  • any other member of the subgenus Asinus
• Buttocks (in informal American English)

Ass or ASS may also refer to:

• Ass (album), 1973 album by the band Badfinger
• "Ass", a 2016 song by Momus from his 2016 album Scobberlotchers
• ASS Altenburger, a German playing card manufacturer
• Agents of Secret Stuff, a 2010 action comedy film

• ASS (car), a French car made from 1919 to 1920
• ASS (gene), a human gene that encodes for the enzyme argininosuccinate synthetase
• Ass (M), in abstract algebra, denotes the collection of all associated primes of a module M
• Advanced SubStation Alpha (extension .ass), a file format used for subtitles
• Angle-side-side, condition in geometry that does not prove congruence of two triangles (also called SSA)
• Arsenic sulfide, the basic chemical formula AsS

• áss, one of the Æsir in Old Norse mythology
• Advisory Service for Squatters, a non-profit group based in London, UK
• Alliance of Sahel States, an intergovernmental military alliance between Mali, Niger and Burkina Faso

• Arse (disambiguation)
• AS (disambiguation)
• As (Roman coin), plural form asses
• Assessment (disambiguation)
• Asshole (disambiguation)
• Asse (disambiguation)
• Asso, a town and commune in Lombardy, Italy
• Feast of the Ass, a medieval Christian feast
• Jackass (disambiguation)
• Paul van Ass, Dutch field hockey coach
• Wild ass (disambiguation)

This disambiguation page lists articles associated with the title Ass.
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