Definition of "snag" []

• A rough, sharp, or jagged protuberance, as: (noun)
• A tree or a part of a tree that protrudes above the surface in a body of water. Also called sawyer. See Regional Note at preacher. (noun)
• A snaggletooth. (noun)
• A break, pull, or tear in fabric. (noun)
• An unforeseen or hidden obstacle. See Synonyms at obstacle. (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.

• "The snag is that such a drug would also affect other areas of autonomic nerve control, such as tear and saliva production, eye muscles, digestive system, heart rate, bladder and bowel function."
• "The snag is that your credit card is going to be charged for a while -- but unlike some magazine subscriptions, it won't be forever."
• "The snag is that your credit card is going to be charged for a while -- but unlikesome magazine subscriptions, it won't be forever."