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.

a column of seven cards of the same rank (such as seven kings)

a meld of at least seven cards of the same rank

a meld of at least seven cards, whether natural or wild

Canasta is a matching card game in which the object is to create melds of cards of the same rank and then go out by playing or discarding all the cards in your hand.