To muddle; confuse: "My brain is a bit addled by whiskey” ( Eugene O'Neill). See Synonyms at confuse.
To become confused.
To become rotten, as an egg.
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.