a wheeled vehicle that runs on rails and is propelled by electricity
"The electric trolley glided silently along the tracks through the city center."
A cart or shopping cart; a shopping trolley.
"I grabbed my favorite snacks and placed them in the empty trolley at the supermarket entrance."
In plain English: A trolley is a wheeled cart used for carrying things, often seen at supermarkets holding groceries.
"The shopping trolley was empty when we walked out of the supermarket."
Usage: In British English, use "trolley" to refer to the wheeled carts found in supermarkets and airports, whereas American English typically uses "cart." Do not confuse this with an overhead rail system for trams or trains, which is called a tramcar or simply a train.
To bring to by trolley.
"The waiter brought the dessert to us by trolley while we were finishing our coffee."
The word trolley originated in early 19th-century Suffolk dialect as a diminutive form related to the verb "troll," meaning to trundle or roll. It was first used around 1823 to describe a cart before evolving into its modern sense of a wheeled vehicle for public transport.