par·fait. n. 1. A dessert made of cream, eggs, sugar, and flavoring frozen together and served in a tall glass. 2. A dessert made of several layers of different flavors of ice cream or ices, variously garnished and served in a tall glass.oun. 1. parfait-layers of ice cream and syrup and whipped cream. frozen dessert-any of various desserts prepared by freezing.