| Term | Definition |
| abase | To lower in position, estimation, or the like; degrade. |
| abbess | The lady superior of a nunnery. |
| abbey | The group of buildings which collectively form the dwelling-place of a society of monks or nuns. |
| abbot | The superior of a community of monks. |
| abdicate | To give up (royal power or the like). |
| abdomen | In mammals, the visceral cavity between the diaphragm and the pelvic floor; the belly. |
| abdominal | Of, pertaining to, or situated on the abdomen. |
| abduction | A carrying away of a person against his will, or illegally. |
| abed | In bed; on a bed. |
| aberration | Deviation from a right, customary, or prescribed course. |
| abet | To aid, promote, or encourage the commission of (an offense). |
| abeyance | A state of suspension or temporary inaction. |
| abhorrence | The act of detesting extremely. |
| abhorrent | Very repugnant; hateful. |
| abidance | An abiding. |
| abject | Sunk to a low condition. |
| abjure | To recant, renounce, repudiate under oath. |
| able-bodied | Competent for physical service. |
| ablution | A washing or cleansing, especially of the body. |
| abnegate | To renounce (a right or privilege). |
| abnormal | Not conformed to the ordinary rule or standard. |
| abominable | Very hateful. |
| abominate | To hate violently. |
| abomination | A very detestable act or practice. |
| aboriginal | Primitive; unsophisticated. |
| aborigines | The original of earliest known inhabitants of a country. |
| aboveboard | Without concealment, fraud, or trickery. |
| abrade | To wear away the surface or some part of by friction. |
| abrasion | That which is rubbed off. |
| abridge | To make shorter in words, keeping the essential features, leaning out minor particles. |
| abridgment | A condensed form as of a book or play. |
| abrogate | To abolish, repeal. |
| abrupt | Beginning, ending, or changing suddenly or with a break. |
| abscess | A Collection of pus in a cavity formed within some tissue of the body. |
| abscission | The act of cutting off, as in a surgical operation. |
| abscond | To depart suddenly and secretly, as for the purpose of escaping arrest. |
| absence | The fact of not being present or available. |
| absent-minded | Lacking in attention to immediate surroundings or business. |
| absolution | Forgiveness, or passing over of offenses. |
| absolve | To free from sin or its penalties. |
| absorb | To drink in or suck up, as a sponge absorbs water. |
| absorption | The act or process of absorbing. |
| abstain | To keep oneself back (from doing or using something). |
| abstemious | Characterized by self denial or abstinence, as in the use of drink, food. |
| abstinence | Self denial. |
| abstruse | Dealing with matters difficult to be understood. |
| absurd | Inconsistent with reason or common sense. |
| abundant | Plentiful. |
| abusive | Employing harsh words or ill treatment. |
| abut | To touch at the end or boundary line. |