| abjure |
to repudiate or renounce solemnly, as under oath; forswear. |
| aerosol |
a liquid substance, such as an insecticide, disinfectant, deodorant, or paint, sealed in a container under pressure and dispensed as a fine spray. [1/2 definitions] |
| aerostatics |
(used with a sing. verb) the branch of aeromechanics that deals with gases in equilibrium and with the equilibrium of airborne bodies or aircraft under changing atmospheric conditions. |
| age of majority |
the age at which a person is granted by law the rights and responsibilities of an adult, such as liability under contract and the right to sue. |
| aground |
on or onto ground, esp. under water. [2 definitions] |
| air force |
the aviation branch of a nation's military forces, or one of the units under an air command. |
| allied |
under treaty, as two nations. [1/3 definitions] |
| Álvar Nuñez Cabeza de Vaca |
a Spanish explorer who, after landing on the cape of Florida in 1528 and being stranded in the Gulf coast region for 8 years, published an account of his survival and interaction with the native peoples under the title "La relación" (1542) (b.1490?--d.1557?). |
| anytime |
under any circumstances; always. [1/2 definitions] |
| apprehend |
to catch and place under arrest. [1/4 definitions] |
| apprehension |
the act of catching and placing under arrest. [1/3 definitions] |
| apropos |
in connection with the topic just mentioned or under discussion. [1/4 definitions] |
| Aquarius |
a person born under this sign, between January 21 and February 20. [1/3 definitions] |
| archway |
the passageway under an arch. [1/2 definitions] |
| Aries |
a person born under this sign, between March 21 and April 20. [1/3 definitions] |
| artesian well |
a well dug through impermeable strata, reaching water that is under pressure. |
| at gunpoint |
under the threat of being shot. |
| at worst |
under the worst possible circumstances; in the worst possible case or from the worst perspective. |
| autarchy |
a state or government under such a power. [1/3 definitions] |
| autoclave |
a container made to hold superheated steam under pressure, used for sterilizing medical instruments or the like or for cooking. [1/2 definitions] |
| axilla |
an armpit or a corresponding part, such as the area under a bird's wing. [1/2 definitions] |