The quality or state of being mobile.
The movement of people, as from one social group, class, or level to another: "There's been . . . restructuring of industry and downward mobility for Americans as a whole” ( Lawrence W. Sherman).
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.