What is the meaning of ?

A letter of the Runic alphabet, present in the Elder Fuþark (), the Anglo-Saxon Fuþorc (, called ūr), and the Younger Fuþark (, called úr), representing /u/ or /uː/ and associated with dross of metal (in the Old Norwegian rune poem), rain (in the Old Icelandic one and in a runic rebus from the Old Church in Bø), and the aurochs (in the Anglo-Saxon one).

the second letter of the Old English runic alphabet, representing /u/ and pronounced ūr (aurochs)

Runic spelling of ey

Source: wiktionary.org