Real Dictionary

banana split
countable noun: A banana split is a kind of dessert. It consists of a banana cut in half along its length, with ice cream, nuts, and sauce on top.

banana split in American English
noun: an elaborate confection, typically consisting of a banana sliced lengthwise, on top of which are placed two or more scoops of ice cream, fruit or other syrup, and a topping of whipped cream, nuts, and a maraschino cherry

banana split in British English
noun: a dish of ice cream and banana cut in half lengthwise, usually topped with syrup, nuts, whipped cream, etc