| Abbreviation | Definition |
|---|---|
| A.D. | Christian era (anno Domini [Lat.]) |
| AA | Allahu Akbar = God is Great in Arabic |
| AA | Anti Apostle |
| AA | ArchAngel |
| AABC | Accrediting Association of Bible Colleges |
| AABC | Asian American Baptist Church |
| AABF | All Africa Baptist Fellowship |
| AAC | Alabama Alliance of Churches |
| AAC | American Anglican Council |
| AACC | All Africa Conference of Churches |
| AACC | American Association For Christian Counselors |
| AACC | American Association Of Christian Counselors |
| AACCB | Anglophone Africa Catholic Community Brussels |
| AACCC | African American Council of Christian Clergy |
| AACCO | African American Catholic Community of Oregon |
| AACF | African American Christian Foundation |
| AACF | Asian American Christian Fellowship |
| AACH | Asian American Church of Houston |
| AACS | Annapolis Area Christian School |
| AACSC | African American Christian Student Conference |