Its precise meaning and function are not known. From Korean sources, namely the Samguk Sagi, it would appear that the title of Galmunwang was granted to very high-ranking personages in early Silla and was equivalent to the king but without right of succession.
Galmunwang's true meaning and purpose remain obscure. However, from Korean historical accounts, such as the Samguk Sagi, it can be inferred that this title was reserved for exceptionally powerful individuals in early Silla, mirroring the status of a king but without the right to pass on the throne.