One of four face cards in a deck bearing a picture of a young prince WordNet 3.0 & Open English WordNet

A Jack or Knave, in some games referred to as a Bower, in Tarot card games as a Valet, is a playing card which, in traditional French and English decks, pictures a man in the traditional or historic aristocratic or courtier dress, generally associated with Europe of the 16th or 17th century. Wikipedia

The lowest-ranking face card in some types of deck Wikipedia Disambiguation

Playing card Wikidata

A playing card marked with the figure of a servant or soldier. OmegaWiki

A playing card marked with the figure of a servant or soldier; a jack. Wiktionary

Playing card. Wiktionary (translation)