What is the meaning of 王?

a king, especially one who is not East Asian or was East Asian in pre-imperial times; in China and Vietnam, generally a king before Qin Shi Huangdi who invented the title 皇帝 (kōtei, “huangdi; emperor”); in Korea, one of the many kings before the Korean Empire which was modeled after Japan's; in Japan, one of the rulers before Emperor Jinmu

an East Asian queen regnant

a nobility title for a Chinese or Vietnamese prince, bestowed on one of the 皇帝 (kōtei, “huangdi; emperor”)'s adult sons, brothers, or nephews, especially as a coming-of-age title, generally comes with an estate ("principality"); compare 皇子 (ōji, “imperial princes”, especially pre-adult ones) and 公 (kō, “dukes”, an alternative used by certain dynasties)

a Japanese prince's son (such princes include 親王 (shinnō) or 王 (ō) themselves)

an ancient Korean king

a king

an East Asian queen regnant

an East Asian sovereign prince

a monarch: a king, an emperor

an unofficial prince: a son or grandson of the Japanese emperor who has not been officially proclaimed as in line for the throne

an ancient Korean king

in ancient Japan, a clan name bestowed on members of the Baekje royal family who immigrated to Japan

Source: wiktionary.org