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 (tə-nō′, tŏn′ō′)
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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



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]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


n (Aut)
(of car)hinterer Teil (mit Rücksitzen/Rückbank)
(also tonneau cover)Verdeck nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in classic literature ?
He still admired Claire intensely and experienced disturbing emotions when he beheld her perfect tonneau and wonderful headlights; but he regarded her with a cautious fear.
"I can stick it in front with you, and we can cover - him up in the tonneau."
"It's quite warm in the tonneau. Why did you let him ride in front?
You need the right tonneau covers for your truck, and you can preserve your cargo and protect it from external factors at all times.
LEER's newest folding tonneau will be on display for the first time at the LEER booth at SEMA (LVCC, South Hall, Upper Level, booth# 35039).
The model features new 21-inch cross-spoke wheels, a lightweight tonneau cover rather than a convertible top.
In 2013, it took part in seven different events - the last entry in its history before 2016, when it was repainted dark blue and trimmed with burgundy leather and a new hood, tonneau and sidescreens were fitted.
A rule is a verbal description of a behavioral contingency (either manifest or covert) that can affect our behavior in a similar way to the described contingencies themselves (Alcaraz, 1990; Mowrer, 1954; Stemmer, 1973; Tonneau, 2004; Tonneau & Gonzalez, 2004).
Gloss finish carbonfibre has been used for the bumpers/splitters and end plates, front underbody section, and many body parts including the A-pillars, bonnet and rear deck, 'Longtail' Airbrake and electrically retractable roof and tonneau.
The tonneau itself provides the most significant example of Bentley craftsmanship at its finest.