| UFO |
abbreviation of "unidentified flying object." |
| ufology |
the study of photographs and reports of unidentified flying objects, esp. considered as spacecraft from other planets. |
| Uganda |
an East African country between Kenya and the Democratic Republic of the Congo. |
| ugh |
used to express disgust, horror, aversion, or the like. |
| uglify |
to make ugly. |
| ugly |
having an unpleasant appearance; unattractive; unsightly. [4 definitions] |
| ugly duckling |
a person or thing that at first seems unattractive or unpromising, but later becomes beautiful or admirable. |
| Ugrian |
denoting or pertaining to an ethnic group that includes the Magyars and certain peoples of Siberia. [3 definitions] |
| Ugric |
a branch of the Finno-Ugric languages that includes Hungarian. [2 definitions] |
| uh |
used to show hesitation or uncertainty, often unintentionally, as in collecting one's thoughts. |
| UHF |
abbreviation of "ultrahigh frequency," any radio frequency between three hundred and three thousand megahertz. |
| uh-huh |
used to indicate a positive or affirmative response, or to show that one is paying attention. |
| uh-oh |
used to express a sudden knowledge or apprehension that something bad is about to happen. |
| uh-uh |
used to indicate a negative response. |
| U-joint |
variant of universal joint. |
| UK |
abbreviation of "United Kingdom," a northwestern European country between the Atlantic Ocean and the North Sea, comprising Great Britain and Northern Ireland; United Kingdom of Great Britain and Northern Ireland (usu. prec. by, "the"). |
| ukase |
in imperial Russia, a proclamation of the czar that was legally binding. [2 definitions] |
| Ukraine |
an East European country bordered primarily by Poland, Russia, and the Black Sea. |
| Ukrainian |
of or pertaining to Ukraine or its people, culture, language, or the like. [3 definitions] |
| ukulele |
a small guitarlike musical instrument with four strings that was popularized in Hawaii. |
| ulcer |
an inflamed open sore on or in the body that is marked by death of tissue and the production of pus, esp. such a sore in the stomach or small intestine. [2 definitions] |