To make impossible, as by action taken in advance; prevent. See Synonyms at prevent.
To exclude or prevent (someone) from a given condition or activity: Modesty precludes me from accepting the honor.
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.