| active |
always doing something; busy; full of energy. [2 definitions] |
| actively |
in a way that involves making an effort, taking action, or participating. |
| activist |
a person who fights openly and vigorously for a cause. |
| activity |
the condition of being active or doing something. [2 definitions] |
| actor |
a person who acts a part in a play, a movie, or a radio or television program. |
| actress |
a woman or girl who plays a part in movies, television, plays, or radio. |
| actual |
truly existing, or being something that is real or true. |
| actually |
as a matter of fact; really. |
| act up |
to behave in a bad or mischievous way; misbehave. [2 definitions] |
| acupuncture |
the practice of relieving pain or curing a disease by putting needles into certain parts of the body. Acupuncture is a traditional way to treat disease in China. |
| acute |
sharp; severe. [4 definitions] |
| acute angle |
an angle of less than ninety degrees. |
| A.D. |
after the birth of Jesus Christ. A.D. is an abbreviation for anno domini, which means "in the year of the Lord" in Latin. Something that happened in A.D. 50 happened fifty years after the birth of Christ. |
| ad |
a short form of "advertisement," a public notice that tells people about products for sale, events, employment opportunities, or the like. |
| adage |
an old familiar saying that shows the wisdom of a group of people; proverb. |
| adapt |
to change for a particular use. [2 definitions] |
| adaptable |
abed to be changed in order to serve a different purpose or work in a new way. [2 definitions] |
| adaptation |
the act or process of changing or adjusting something to fit in a new role or context. [4 definitions] |
| add |
to put on or with something else to make larger or better. [5 definitions] |
| added |
further; extra. |
| addend |
a number or amount added to another to form a sum. |