What is the meaning of ᚹ?

A letter of the Runic alphabet, present in the Elder Fuþark (ᚹ) and the Anglo-Saxon Fuþorc (ᚹ, called wynn), representing /w/ and associated with joy and bliss in the Anglo-Saxon rune-poem.

the eighth letter of the Old English runic alphabet, representing /w/ and pronounced wynn (“joy”)

Source: wiktionary.org