A railway designed to operate on steep slopes and having a locomotive with a center cogwheel that engages with a cogged center rail to provide traction. Also called rack railway.(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.