What is the meaning of ᚢ?

A letter of the Runic alphabet, present in the Elder Fuþark (ᚢ), the Anglo-Saxon Fuþorc (ᚢ, called ūr), and the Younger Fuþark (ᚢ, 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 Anglo-Frisian (5th–9th c.) and Old English (9th–13th c.) runic alphabet, representing /u(ː)/ and pronounced ūr (“aurochs”)

the second letter of the Old Norse runic alphabet, representing /u/, /ø/, /v/ (secondarily: /y/, /œ/) and pronounced úr (“precipitation”)

Runic spelling of øy (East Norse), ey (West Norse)

the second letter of the Proto-Norse runic alphabet, representing /u/ and pronounced *ᚢᚱᚨ (*ūrą, “water?”) or potentially *ᚢᚱᛁᛉ (*uriʀ, “aurochs”)

the second letter of the Anglo-Frisian runic alphabet (5th–9th c.), representing /u/ and pronounced *ūr (“aurochs”)

the second letter of the Proto-West Germanic runic alphabet (1st–8th c.), representing /u/ and pronounced *ūr (“aurochs”)

Source: wiktionary.org