Double-decker

n.	1.	(Naut.) A man-of-war having two gun decks.
	2.	A tenement house having two families on each floor.
	3.	anything having two decks or levels, as a bus with two levels for passengers. In older vehicles, less often today, the upper deck was open, as on street cars.

Noun

1.

double-decker - a vehicle carrying many passengers; used for public transport; "he always rode the bus to work" Synonyms: autobus, bus, charabanc, jitney, motorbus, motorcoach, omnibus, coach

autobus, bus, charabanc, coach, fleet, jitney, motorbus, motorcoach, omnibus, passenger, public transport, rider, roof, school bus, trackless trolley, trolley coach, trolleybus, window