A stone marker set up on a roadside to indicate the distance in miles from a given point.
An important event, as in a person's career, the history of a nation, or the advancement of knowledge in a field; a turning point.
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.