A quantity into which each of two or more quantities may be divided with zero remainder: The quantities 6, 12, and 24 are common multiples of 2 and 3. (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.