the GNU version of the Collaborative International Dictionary of English
n. One who, or that which, annihilates.
The Century Dictionary and Cyclopedia
n. One who or that which annihilates.
n. In mathematics, an operator which reduces a given kind of expression to zero.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a total destroyer
Word Usage
"The first fire extinguishers were of the "annihilator" pattern, so arranged in a building that when a fire occurred carbonic acid gas was evolved, and, if the conditions were right (as the mediums say), the fire was put out."