Definition of "amplitude modulation" [amplitude modulation]

• The encoding of a carrier wave by variation of its amplitude in accordance with an input signal. (noun)
• A broadcast system that uses amplitude modulation. (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.