Webster's 1913 Dictionary
TONNEAU
Ton `neau ", n.; pl. Tonneaux (#). [F.]
1. In France, a light-wheeled vehicle with square or rounded body and rear entrance.
2. (Automobiles ) Orig. , the after part of the body with entrance at the rear (as in vehicle in def. 1 ); now, one with sides closing in the seat or seats and entered by a door usually at the side, also, the entire body of an automobile having such an after part.
3. = Tonne.
New American Oxford Dictionary
tonneau
ton neau |təˈnō, ˈtänō təˈnoʊ | ▶noun ( pl. tonneaus or tonneaux |təˈnōz, ˈtänōz | ) the part of an automobile, typically an open car, occupied by the back seats. • short for tonneau cover.
tonneau cover
ton neau cov er ▶noun a protective cover for the seats in an open car or cabin cruiser when they are not in use.
Oxford Dictionary
tonneau
tonneau |ˈtɒnəʊ | ▶noun 1 the part of a car, typically an open car, occupied by the back seats. • short for tonneau cover. 2 a unit of capacity for French wine, especially Bordeaux, usually equal to 900 litres or 198 gallons. ORIGIN late 18th cent. (in sense 2 ):French, literally ‘cask, tun ’.
tonneau cover
ton |neau cover ▶noun a protective cover for the seats in an open car or cabin cruiser when they are not in use.
Duden Dictionary
Tonneau
Ton neau Substantiv, maskulin , der |tɔˈnoː |der Tonneau; Genitiv: des Tonneaus, Plural: die Tonneaus gallisch-mittellateinisch-französisch 1 veraltet Schiffslast von 1 000 kg 2 früheres französisches Hohlmaß
French Dictionary
tonneau
tonneau n. m. (pl. tonneaux ) nom masculin 1 Contenu d ’un tonneau. : Un tonneau de bière. 2 Grand récipient cylindrique limité à chaque extrémité par un fond plat et destiné à contenir un liquide. : Des tonneaux de chêne. LOCUTION Le tonneau des Danaïdes. figuré Travail sans fin.
The Wordsmith Dictionary