To make or declare void or invalid, as a marriage or a law; nullify.
To obliterate the effect or existence of: "The significance of the past . . . is annulled in idle gusts of electronic massacre” ( Alexander Cockburn).
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.