trolley

Concise Oxford English Dictionary © 2008 Oxford University Press:
trolley/ˈtrɒli/

▶noun (pl. trolleys)

• 1 Brit. a large wheeled metal basket or frame used for transporting items such as luggage or shopping.

  ■ a small table on wheels, used to convey food and drink.

• 2 (also trolley wheel) a wheel attached to a pole, used for collecting current from an overhead electric wire to drive a tram.

• 3 short for trolleybus or trolley car.

– phrases
off one's trolley informal mad; insane.

– origin C19: of dial. origin, perh. from troll2.