| activation code |
a set of characters, consisting of numbers, letters, characters, or a combination of these, that is sent by a website to a user's email so that the website can verify the user's email address and comply with the user's request to begin a new service or change personal information. Once received, the user enters the code into the provided box on the website so that fulfillment of the user's request can begin. |
| active |
constantly doing something; busy; energetic. [7 definitions] |
| active duty |
the status of full-time service or work, esp. in the military. |
| active immunity |
an organism's immunity to a disease because of its production of antibodies. |
| actively |
in a way that involves making an effort, taking action, or participating; not passively. |
| activism |
the belief in or practice of trying to make social or political changes through active, militant, or demonstrative involvement, esp. in particular issues. |
| activist |
one who advocates a cause with vigor or militance. |
| activity |
the condition or state of being active. [4 definitions] |
| act of God |
in law, a sudden unforeseen event, esp. a natural disaster such as an earthquake, flood, or tornado, that is caused entirely by forces of nature and could not have been prevented. |
| actor |
one who plays roles in dramatic productions on stage, in films, or on radio and television. [2 definitions] |
| actress |
a woman or girl who plays roles in dramatic productions. |
| Acts |
see "Acts of the Apostles." |
| Acts of the Apostles |
the fifth book of the New Testament of the Christian Bible, believed to have been written by Luke, which describes the work of Jesus Christ as it was carried on after his death by his apostles. |
| actual |
truly existing or happening, not just potentially or in the imagination. [3 definitions] |
| actuality |
the state or fact of truly or currently existing; reality. [2 definitions] |
| actualize |
to make real; to give substance to. |
| actually |
as a matter of fact; really. [2 definitions] |
| actuary |
a person who calculates insurance rates, risks, and dividends on the basis of statistical probabilities. |
| actuate |
to put into action or set in motion; cause to operate. [2 definitions] |
| act up |
to behave in a bad or mischievous way; misbehave. [3 definitions] |
| acuity |
sharpness or keenness, as of sense perception or understanding. |