Definition of "sheep-dog" []

• A dog trained to watch and tend sheep; especially, a collie. (noun)
• A chaperon. (noun)

The Century Dictionary (Public Domain)

• "On the other hand, being a sheep-dog, her instinctive fear of the Wild, and especially of the wolf, was unusually keen."
• "Hardly had the carriage entered the grounds, when he was set upon by a sheep-dog, bright-eyed, sharp-muzzled, righteously indignant and angry."
• "I adjusted his rug, knelt down, took one of his claws in both hands (an artistic touch, that) and gazed on him like a wistful sheep-dog."