Real Dictionary

coupé
countable noun: A coupé is a car with a fixed roof, a sloping back, two doors, and seats for four people.
countable noun: A coupe is the same as a coupé.

coupe in American English
a closed carriage seating two passengers, with a seat outside for the driver
a closed, two-door automobile with a body smaller than that of a sedan
adjective: having the field divided across the middle by a broad horizontal band
noun: a short, four-wheeled, closed carriage, usually with a single seat for two passengers and an outside seat for the driver

coupe in American English 1
noun: a closed, two-door car shorter than a sedan of the same model

coupe in American English 2
noun: ice cream or sherbet mixed or topped with fruit, liqueur, whipped cream, etc

coupe in British English
noun: a dessert of fruit and ice cream, usually served in a glass goblet
noun: a four-seater car with a fixed roof, a sloping back, and usually two doors