0 a metal structure on wheels that is used for carrying things -- carrello, carretto
a luggage trolley un carrello portabagagli
1 an electric vehicle that transports people, usually in cities, and goes along metal tracks in the road -- tram
3 (also tea-trolley, ( American) teacart) a small cart, usually consisting of two or three trays fixed on a frame, used for serving tea, food etc -- carrello
She brought the tea in on a trolley.