Definition of "trolley" []

• A streetcar. (noun)
• A device that collects electric current from an underground conductor, an overhead wire, or a third rail and transmits it to the motor of an electric vehicle. (noun)
• A small truck or car operating on a track and used in a mine, quarry, or factory for conveying materials. (noun)
• A wheeled carriage, cage, or basket that is suspended from and travels on an overhead track. (noun)
• Chiefly British A cart. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The ads were designed by the New York ad agency DeVito/Verdi, which vetoed one idea as too crass: This trolley is a lot like your mother."
• "Secondly, because the trolley is a rail-guided vehicle -- it doesn't steer, therefore it doesn't swerve, and, more to the point, it doesn't wander across several lanes of traffic to argue with another vehicle."
• "Second, if a trolley is again headed for those five people (with no alternate track), should you push a fat man in the way of the trolley, killing him, but derailing the car and again saving the five?"