Also found in: Encyclopedia, Wikipedia.
n. pl. ton·neaus
1. The rear seating compartment of an early type of automobile.
2. A tight-fitting removable cover, as for the cargo box of a pickup truck, the seating area of a convertible, or the cockpit of a boat.
[French, from Old French tonnel, cask; see tunnel.]
n, pl -neaus or -neaux (-nəʊ; -nəʊz)
1. (Automotive Engineering)
a. a detachable cover to protect the rear part of an open car when it is not carrying passengers
b. a similar cover that fits over all the passenger seats, but not the driver's, in an open vehicle
2. (Automotive Engineering) rare the part of an open car in which the rear passengers sit
[C20: from French: special type of vehicle body, from Old French tonnel cask, from tonne tun]
n., pl. -neaus, -neaux (-ˈnoʊz)
a rear part or compartment of an automobile body, containing seats for passengers.
[1900–05; < French: literally, cask; Old French tonel. See tunnel]