A prince consort is the husband of a monarch who is not a monarch in his own right. In recognition of his status, a prince consort may be given a formal title, such as prince. Most monarchies do not allow the husband of a queen regnant to be titled as a king because it is perceived as a higher title than queen, however, some monarchies use the title of king consort for the role.

A prince is a male ruler or a male member of a monarch's or former monarch's family. Prince is also a title of nobility, often hereditary, in some European states. The female equivalent is a princess. The English word derives, via the French word prince, from the Latin noun prīnceps, from primus (first) and caput (head), meaning "the first, foremost, the chief, most distinguished, noble ruler, prince".