| UAR |
abbreviation of "United Arab Republic," the official name of Egypt in 1958-61. [2 definitions] |
| UAW |
abbreviation of "United Automobile, Aerospace, and Agricultural Implement Workers" (formerly, United Automobile Workers). |
| ubiquitous |
being or appearing to be in all places at the same time; omnipresent. |
| ubiquity |
the condition of being, or seeming to be, everywhere at the same time; omnipresence. |
| U-boat |
a German submarine. |
| udder |
a large mammary organ with two or more glands, each with its own nipple, as in a cow or goat. |
| udon |
thick Japanese noodles made from wheat flour, salt, and water. |
| 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. |