| Abbreviation | Definition |
|---|---|
| ACW | A Christian Witness |
| ACW | American Christian Writers |
| ACW | Anglican Church Women |
| ACWC | Allied Christian Worship Centre |
| ACWI | Arizona Christian Worldview Institute |
| ACWR | Apostolic Christian World Relief |
| ACWR | Archivists for Congregations of Women Religious |
| AD | After Death |
| AD | Anno Domani |
| AD | Ante Diluvium (After the Flood) |
| ADCA | Advance Daily Christian Advocate |
| ADCCW | Arlington Diocesan Council of Catholic Women |
| ADCCW | Arlington Diocese Council of Catholic Women |
| ADCCW | Austin Diocesan Council of Catholic Women |
| ADDRO | Anglican Diocesan Development and Relief Organization |
| ADF | A Druid Fellowship |
| ADF | Arn Driaocht Fein |
| ADIG | Armidale Diocesan Investment Group |
| ADO | Apprentice Development Officer |
| ADR | Army of Divine Rights |