The World (XXI) is the 21st trump or Major Arcana card in the tarot deck. It can be incorporated as the final card of the Major Arcana or tarot trump sequence (the first or last optioned as being "The Fool" (0). It is associated with the 22nd letter of the Hebrew alphabet, 'Tau', also spelled 'Tav' or 'Taw'.

The Major Arcana are the named or numbered cards in a cartomantic tarot pack, the name being originally given by occultists to the trump cards of a normal tarot pack used for playing card games. There are usually 22 such cards in a standard 78-card pack, typically numbered from 0 to 21. The name is not used by tarot card game players.