Dou"ble-deck"er (?), n.
1. (Naut.)
A man-of-war having two gun decks.
2.
A public conveyance, as a street car, with seats on the roof. [Colloq.]
© Webster 1913
Dou"ble-deck"er, n.
(a)
A tenement house having two families on each floor. [Local, U. S.]
(b)
A biplane aëroplane or kite. [Colloq.]
© Webster 1913