| Amoral | | Literally, " In the year of our lord," years since the birth of Christ |
| Autonomous | | Before noon-a.m. |
| Autonomy | | The direct contrast of one thing to another, the opposite |
| Autonomic | | A self-operating mechanism, a robot; mechanism designed to follow preset operations |
| Anecdote | | An animal that lives both on land and in the water; also an aircraft that can make either land or water landings |
| Anomaly | | A person one struggles against in a conflict, contest, or race |
| Apathy | | The classical era; ancient times |
| Ambiguous | | One who is a hater of humans; people hater |
| Ambitious | | Generously overlooking a fault or wrong and forgiving it |
| Ambivalent | | Relating to, or marked by autonomy; existing, responding, acting independently |
| Animosity | | An act, form, or instance of charity or benevolence |
| Amphibian | | Literally before the war (especially the civil war in the united states) |
| Ambivert | | A shortened account of an amusing or historical incident (originally the word meant unpublished) |
| Anno Domini - A.D. | | Equal or balanced mind particularly under stress or strain; calmness |
| Automaton | | Occurs 2 times each year |
| Antagonize | | Literally, not normal; irregular, odd, peculiar, or strange |
| Antithesis | | Eager to succeed or move forward (originally this word was associated with moving around and soliciting votes but common usage has eliminated the political connontations) |
| Anticlimax | | Located in front of a rear counterpart; going in time before, situated before |
| Antagonist | | Ill-will, hostility; a strong dislike |
| Anthropology | | One whose personality is part introvert and part extrovert |
| Antiquity | | Having 2 possible definitions, answers, or meaning |
| Anterior | | The discipline or study of the physical, social, and cultural development of humans |
| Ante Meridiem | | An event, statement, or conclusion that is much less important than what preceded it or was expected |
| Antebellum | | Lasting for an indefinite (long) time, or a plant that returns yearly |
| Equanimity | | The right of self government; self-directing freedom and moral independence |
| Magnanimous | | Unable to distinguish or indifferent to questions of right from wrong; without moral structure |
| Perennial | | To irritate or make unfriendly or hostile |
| Semiannual | | Acting or occurring involuntarily |
| Misanthrope | | Having mixed feeling about 2 people or things; conflicted in choosing between 2 courses of action |
| Philanthropy | | Literally, no emotion; lacking in emotion, excitement, or passion |
