a transport line that uses trolley buses or trolley cars
a trolley line without poles
Brussels' old trolley line is surely the most unusual internal transportation systemincorporated into any resort.
trolley line in American English
noun
1.
the route of a trolley car or trolley bus
2.
a public or private transportation system using trolley cars or trolley buses
Word origin
[1890–95, Amer.]This word is first recorded in the period 1890–95. Other words that entered Englishat around the same time include: blip, bootstrap, cholesterol, plein-air, wireless