What is the meaning of ᚳ?

A letter of the Runic alphabet, present in the Anglo-Saxon Fuþorc (called cēn), representing /k/ or /tʃ/ and associated with a torch in the Anglo-Saxon rune-poem.

the sixth letter of the Old English runic alphabet, representing /k/ or /tʃ/ and pronounced ċēn (“torch”)

Source: wiktionary.org