kahuna /kəˈhuːnə/noun 2forms 1phrases 1 noun2 •A priest or priestess of the traditional Hawaiian religion.They were kāhuna, practitioners of the old Hawaiian religion, apparently offering themselves as sacrifices to appease the gods so that the queen would be restored. — 2012 •A great surfer. formskahunas Phrases with kahuna big kahunaA boss, leader, chieftain, or top-ranking person in an organization.