Definition of "bailiwick" [bail•i•wick]

• A person's specific area of interest, skill, or authority. See Synonyms at field. (noun)
• The office or district of a bailiff. (noun)

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.

• "As Jim has mentioned, my bailiwick is law firm libraries, as opposed to academic libraries."
• "What I'm trying to say is, your basic religion doesn't seem to make much of a difference to your belief (or lack of it) in the things that are more in my bailiwick, which is any kind of contact with the dead."
• "And I think I'm probably taking you outside a little bit of your bailiwick, which is intelligence."