[U.F.O.] {n. phr.} Unidentified Flying Object. * /Some people think that […]

[ugly duckling] {n.} An ugly or plain child who grows up […]

[unknown quantity] {n.} Someone or something whose value and importance are […]

[up front] (1) {n.}, {slang}, {informal} The managerial section of a […]

[upper crust] {n.}, {informal} The richest, most famous, or important people […]

[upper hand] or [whip hand] {n.} Controlling power; advantage. * /In […]

[upper story] {n.} 1. A floor or level of a building […]

[ups and downs] {n. phr.} Vicissitudes; alternating periods between good and […]

[urban homesteading] {n.}, {informal} Renovation and occupation through cooperative ownership by […]

[utility room] {n.} A room in a house or building for […]