United Nations |
(used with a singular or plural verb) an organization of many nations started in 1945 to promote world peace and understanding. |
United States |
a North American country extending from the Atlantic to the Pacific between Canada and Mexico and including Alaska and Hawaii, also known as "United States of America" (usu. prec. by "the"). |
United States of America |
a country in North America (usually used with "the"). Washington, D.C., is the capital of the United States of America. |
unity |
the condition of being united or of acting as one. |
universal |
of, having to do with, or characteristic of the whole world or the world's population. [2 definitions] |
universe |
all matter and energy; all existing things, including the earth and heavens. |
university |
a large school, where people both learn and do research. A student must finish high school before attending a university. Universities offer several levels of degrees. |
unkind |
not kind or sympathetic; harsh. |
unknown |
not known; not familiar. |
unlawful |
not allowed by law; illegal. |
unless |
except on the condition that. |
unlike |
not alike or equal; different; unequal. [3 definitions] |
unlimited |
having no limits, bounds, or restrictions. |
unload |
to remove the load from. [3 definitions] |
unlock |
to open the lock of by turning a key or mechanism. [3 definitions] |
unlucky |
marked by or involving ill fortune or bad luck. [2 definitions] |
unmanned |
not having a human pilot or crew. |
unnatural |
not according to natural laws or processes. [2 definitions] |
unnecessary |
not needed or required. |
unpack |
to take out of a package, suitcase, or container. [2 definitions] |
unpleasant |
not pleasant or agreeable; distasteful. |