| abdicate |
to formally relinquish a position of power, a claim, or a right. [1/3 definitions] |
| ABM |
abbreviation of "antiballistic missile," a missile designed to meet and destroy a ballistic missile in flight. |
| acetylene |
a highly flammable colorless gas used esp. to cut and weld metal and to give light. |
| achievement |
something successfully carried through, esp. through bold or brave action or thought. [1/2 definitions] |
| acro- |
top; peak; height. [1/2 definitions] |
| aerie |
a house or fortified structure located on a height. [1/2 definitions] |
| afield |
off the familiar or desired track, as in speech or thought. [1/3 definitions] |
| against |
in contrast with, esp. dark on light. [1/5 definitions] |
| airiness |
the quality or condition of being confidently carefree or light. [1/2 definitions] |
| air well |
a usu. central court that is enclosed by the exterior walls of a building and provides air and light. |
| airworthy |
fit and safe for use in flight. |
| alarming |
causing alarm or fright. |
| albedo |
the degree to which a planet, asteroid, or the like reflects light. [1/2 definitions] |
| alit |
past tense and past participle of alight1. |
| altitude |
in geometry, a perpendicular line segment that extends from one vertex of a figure to the opposite edge or face, or the length of such a line segment; height. [1/4 definitions] |
| antiballistic missile |
a missile designed to meet and destroy a ballistic missile in flight. |
| aperçu |
a quick impression, thought, or insight. [1/3 definitions] |
| apparition |
a startling or remarkable sight. [1/2 definitions] |
| appendant |
in law, pertaining to a subsidiary right. [1/4 definitions] |
| approve |
to consider or declare (something) good or right. [1/3 definitions] |
| arc lamp |
a lamp, such as a searchlight, in which light is produced by an electric arc passing through a gas between two hot electrodes; arc light. |