a rear seating compartment of an automobile; also : the entire seating compartment
tonneau
noun(ton-neau)
tonneau cover
tonneau
noun(ton-neau)
a shape of watch case or dial resembling a barrel in profile
tonneau
noun(ton-neau)
a cover (as of fabric) that protects the unoccupied rear seating compartment of a convertible or roadster; also : a lid (as of fabric or aluminum) that covers the bed of a pickup truck