| acronym |
a word formed by putting together the first letters or parts of a series of words in a longer phrase. |
| acrophobia |
a very strong fear of high places. |
| across |
from one side to the other of. [5 definitions] |
| acrylic |
a kind of plastic used to make yarns, paint, and many other things. |
| act |
a thing that is done; deed. [9 definitions] |
| action |
something that is done for a particular purpose. [6 definitions] |
| action verb |
a verb that shows its subject performing some action. "Run," "eat," "fly," and "sing" are examples of action verbs. |
| activate |
to cause action in or make active; start. |
| active |
always doing something; busy; full of energy. [4 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. |