D defs.my
Entry 3 senses Webster, 1913

Tonneau

· Ton·neau · IPA /təˈnoʊ/
01 n. In France, a light-wheeled vehicle with square or rounded body and rear entrance.
pl. Tonneaux ((#))
  1. 1.
    In France, a light-wheeled vehicle with square or rounded body and rear entrance.
  2. 2.
    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.(Automobiles)
  3. 3.
    same as Tonne. See: Tonne