| Term | Definition |
| annotate | to provide with extra notes or comments |
| anomaly | something that is different from the norm |
| anticipate | to look forward to or expect |
| apathy | a lack of any emotion, concern, or interest |
| aristocracy | the upper class |
| aristocrat | a member of the elite, ruling class |
| articulate | to clearly esplain; the quality of being able to speak clearly |
| assert | to demonstrate power; to defend a statement as true |
| assiduous | characteristic of careful and persistent effort |
| assumption | something believed to be true without proof, unsupported |