Definition of "hook" []

• A curved or sharply bent device, usually of metal, used to catch, drag, suspend, or fasten something else. (noun)
• A fishhook. (noun)
• Something shaped like a hook, especially: (noun)
• A curved or barbed plant or animal part. (noun)
• A short angled or curved line on a letter. (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.

• "So the main hook is that you have this kid born into a working class family of petty criminals but against all odds, manages to become the greatest hero the world has seen and fight the good fight."
• "In Holloway-speak, landing a left hook translates as keeping faith with core principles."
• "Your use of the term hook which applies specifically to the opening paragraph of a book mislead me a little; you are talking about setting up a pitch appointment, not submitting pages in advance of such an appointment."