Definition of "puppy-dog" [puppy-dog]

• A pup or puppy. (noun)

The Century Dictionary (Public Domain)

• "The smile faded, his expression puppy-dog hopeful."
• ""Inside, it's about finding someone who loves you completely just the way you are, even in your puppy-dog jammies," says romance blogger Sarah Wendell, co-author of Beyond Heaving Bosoms: The Smart Bitches' Guide to Romance Novels."
• "When I arrived at the office, the first person I saw was the science fellow, who bowed his head with puppy-dog eyes before I could turn away."