Definition of Acn

ACN is a three-letter acronym that may refer to:

• Accenture (NYSE: ACN)
• Achang (ISO/DIS 639-3 code: ACN)
• Achnasheen railway station (National Rail code: ACN), a United Kingdom railway station
• ACN Inc., a multi-level marketing company selling telecommunications services
• Acrylonitrile, a precursor monomer in the manufacture of synthetic polymers
• African Cup of Nations, an international football competition for Confederation of African Football nations
• Andean Community of Nations, a trade block in South America
• Anglican Communion Network, a missionary organisation based in North America
• Ante Christum Natum, the Latin equivalent of B.C., seldom used in English
• Architecture for Control Networks, a network protocol for theatrical control
• Armored Core: Nexus, a game published by From Software for the PlayStation 2
• Australian Company Number, a number issued by the Australian Securities and Investments Commission to registered companies
• American Collectibles Network, the former name of an American television network now known as Jewelry Television

Ante Christum (Natum) is also an album by the band Shadows Land

Ante Christum Natum (Latin for Before Christ (was) Born), usually abbreviated to A.C.N., a.C.n., a.Ch.n. or ACN, denotes the years before the birth of Jesus Christ. It is the modern Latin equivalent to the English term B.C. (Before Christ) and B.C.E. (Before Common Era). The phrase Ante Christum Natum is also seen as the shorter Ante Christum (Latin for Before Christ), again usually abbreviated to A.C. or AC. A related term, p.Ch.n or post Christum natum complements a.Ch.n and is equivalent to Anno Domini.