A cocktail party is a party, usually held in the early evening, where cocktails or other alcoholic drinks are served. People often dress quite formally for them. A party, usually in the early evening, at which cocktails are served. a party, usually in the early evening, at which alcoholic drinks are served and for which people usually dress formally
a graph, consisting of two rows of paired nodes in which all nodes except the paired ones are connected with straight lines; it is the complement of the ladder graph, and the dual graph of the hypercube