| Atlas Mountains |
a range of mountains in northwest Africa stretching across the southwestern part of Morocco and northern parts of Algeria and Tunisia. |
| at last |
after a long time or wait; finally. |
| at least |
at the lowest amount; not less than. [2 definitions] |
| at leisure |
having free or spare time; not working or otherwise occupied. |
| at length |
for a long time; in great detail. [2 definitions] |
| at liberty |
free from bondage. [2 definitions] |
| at loggerheads |
engaged in an argument or dispute. |
| at loose ends |
in an unsettled, uncertain, or confused state. [2 definitions] |
| ATM |
abbreviation of "automated teller machine," a computerized machine serving the function of a bank teller. |
| atman |
in Hinduism, the individual soul striving for enlightenment; breath of life. [2 definitions] |
| ATM card |
a plastic card that enables the holder to access an automated teller machine to obtain cash drawn from or charged against a bank account. |
| atmosphere |
the mass of gases surrounding the earth or any other celestial body. [3 definitions] |
| atmospheric |
of, pertaining to, or consisting of the mass of gases surrounding the earth. [2 definitions] |
| atmospheric river |
a very long and narrow wind corridor that transports a vast amount of water vapor through the sky, which can result in drenching rainstorms for particular areas. |
| atmospherics |
(used with a sing. verb) static in radio reception caused by atmospheric electrical activity. [2 definitions] |
| at odds |
not in agreement; out of harmony. |
| atoll |
a ring-shaped island or reef that surrounds a lagoon. |
| atom |
an invisible component of any element, consisting of protons, neutrons, and electrons, once considered the smallest possible unit of matter. [2 definitions] |
| atom bomb |
see "atomic bomb." |
| atomic |
of or relating to atoms or to the use of atoms in creating energy. [3 definitions] |
| atomic age |
(often cap.) the period in history characterized by the development and use of atomic energy in the generation of electrical power and for immensely destructive weapons. |