The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A bomb that generates a strong electromagnetic pulse in the microwave frequency range, used to destroy or disrupt electronic equipment. Also called microwave bomb.
Origin: e(lectromagnetic) + bomb.