| Term | Definition |
| adept | highly skillful |
| adherent | (two meanings) sticking fast (adjective); follower or supporter (noun) |
| adipose | fatty |
| adjacent | near; close; adjoining |
| adjudicate | to judge |
| adjunct | a subordinate; an assistant |
| admonish | to warn |
| ado | fuss; trouble |
| adonis | a very handsome man |
| adorn | to dress up; to decorate |
| adroit | skillful; clever |
| adulation | excesive praise or flattery |
| adulterate | to make impure |
| advent | an arrival; a coming |
| adventitious | accidental; nonessential |
| adversary | enemy; opponent |
| adversity | a misfortune; distress |
| advocate | to recommend; to defend |
| aegis | a shield; protection; sponsorship |
| aesthetic | pertaining to beauty |
| affable | friendly; agreeable |
| affectation | a phony attitude; insincerity |
| affiliate | to associate or to unite with |
| affinity | attraction to |
| affirmation | a statement that something is true |
| affix | to attach |
| affliction | great suffering; hardship |
| affluence | wealth |
| affront | an insult |
| aftermath | outcome; result |
| agape | open-mouthed; surprised |
| agenda | a list or program of things to be done |
| aggrandize | to enlarge or to expand |
| aggravate | to worsen an already bad situation; to intensify |
| aggregate | to collect; to gather together |
| aghast | shocked; terrified |
| agile | able to move quickly |
| agitate | to upset; to stir up |
| agnostic | one who doubts the existence of God |
| agoraphobia | fear of open places |
| agrarian | pertainingt to farmers and agriculture |
| ague | a fever; plague |
| alacrity | liveliness; willingness |
| albatross | (two meanings) a seabird; a constant burden |
| albeit | although |
| alchemy | chemistry of the Middle Ages |
| alias | an assumed name |
| alien | stranger; foreign |
| alienate | to make others unfriendly to you |
| alimentary | furnishing food or nourishment |
| allay | to relieve or to calm |
| alleged | so-called; supposed |
| allegory | a symbolic work of literature |
| allegro | rapid; quick |
| alleviate | to lessen; to relieve |
| allocate | to set aside for a specific purpose |
| allude | to hint at; to refer to indirectly |
| alluring | tempting; fascinating;charming |
| alluvial | pertaining to a deposit of sand formed by flowing water |
| aloft | up in the air; high |
| aloof | reserved; cool; indifferent |
| alter | to change |
| altercation | an agrument; a disagreement |
| altruism | unselfishness; concern for others |
| amalgamate | to combine; to unite; to blend |
| amass | to accumulate; to collect |
| amazon | a big, strong, masculine women |
| ambidextrous | equally skillful in either hand |
| ambient | surround; on all sides |
| ambigious | unclear; open to more than one interpretation |
| ambivalence | conflicting feelings toward something or someone |
| ambrosial | pleasing to the taste or smell |
| ambulatory | moving about; capable of walking |
| ambuscade | hidden or secret attack |
| ameliorate | to improve; to make better |
| amenable | agreeable; responsive |
| amend | to change; to alter |