The Collaborative International Dictionary of English v.0.48:
canasta \canasta\ n. a form of rummy using two decks and four jokers; jokers and deuces are wild; the object is to meld groups of seven of the same rank. Syn: basket rummy, meld. [WordNet 1.5]WordNet (r) 3.0 (2006):
canasta n 1: a form of rummy using two decks of cards and four jokers; jokers and deuces are wild; the object is to form groups of the same rank [syn: canasta, basket rummy, meld]