watchdog

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a guardian or defender against theft or illegal practices or waste
- she is the global watchdog for human rights abuses
• Hypernyms:
defender, guardian, protector, shielder
2. a dog trained to guard property
• Syn:
guard dog
• Hypernyms:
working dog
• Hyponyms:
kuvasz, attack dog, housedog, schipperke, pinscher