| Term | Definition |
| apodictic | shown by arguement |
| shown by arguement | apodictic |
| apothecary | a pharmacist |
| a pharmacist | apothecary |
| aperture | an opening |
| an opening | aperture |
| apocalypse | a revelation |
| a revelation | apocalypse |
| aposiopesis | a break in thought |
| a break in thought | aposiopesis |
| apophasis | saying that you won't mention |
| saying that you won't mention | apophasis |
| apoplexy | a stroke |
| a stroke | apoplexy |
| apotheosis | deification |
| deification | apotheosis |
| apostrophe | addressing someone in speech |
| addressing someone in speech | apostrophe |
| apostle | one sent on a mission |
| one sent on a mission | apostle |
| apology | a formal defense |
| a formal defense | apology |
| apostate | a renegade |
| a renegade | apostate |
| aposematic | warning |
| warning | aposematic |
| apopemptic | valedictory |
| valedictory | apopemptic |
| apomixis | nonsexual reproduction |
| nonsexual reproduction | apomixis |
| apo | away, up, off |
| away, up, off | apo |