Úr is the Irish name of the eighteenth letter of the Ogham alphabet, , meaning "clay", "earth", "soil". In Old Irish, the letter name was also written Úir. Its phonetic value is [u] or [u:].
UR and A Tear in the Open are two electronic music tracks which appeared on Tiësto's second studio album in 2004, entitled Just Be. Unlike Tiesto's other album from 2004, Parade of the Athletes, Just Be featured only unmixed tracks.