Definition of "sheepdog" [sheepdog]

• A dog trained to guard and herd sheep. Also called shepherd dog. (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.

• "KELLY: That sheepdog is not going to come correct you."
• "An Australian sheepdog is fighting for its life after being bitten while saving its owner from a huge and deadly snake, local media reported on Wednesday."
• "I’m sure the word sheepdog is out here somewhere, and it would just love to help…."