We found 18 dictionaries that define the word guard dog:

General (15 matching dictionaries)

1. guard dog: Merriam-Webster
2. guard dog: Collins English Dictionary
3. guard dog: Vocabulary.com
4. guard dog: Cambridge Advanced Learner's Dictionary
5. guard-dog, guard dog: Wiktionary
6. guard dog: Infoplease Dictionary
7. guard dog: Dictionary.com
8. Guard Dog (film), Guard dog: Wikipedia, the Free Encyclopedia
9. guard dog: Rhymezone
10. guard dog: FreeDictionary.org
11. guard dog: Mnemonic Dictionary
12. guard dog: TheFreeDictionary.com
13. guard dog: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)

14. guard dog: Encyclopedia

Medicine (1 matching dictionary)

15. guard dog: Medical dictionary

Slang (1 matching dictionary)

16. guard dog: Urban Dictionary

(Note: See guard_dogs as well.)

Definitions from Wiktionary (guard dog) ▸ noun:  A dog used to protect a property or its owner. Similar: watchdog, sheepdog, police dog, bandog, work dog, working dog, coachdog, hunter, assistance dog, guide dog, more... Opposite: stray dog, pet dog, lap dog, companion dog Types: Germshepherd, Dobermpinscher, Rottweiler, Bullmastiff, Boxer, Great Dane, Puli, Tibetmastiff, more... Phrases: like a mean guard dog, german guard dog, more... ▸ Words similar to guard dog ▸ Usage examples for guard dog ▸ Idioms related to guard dog ▸ Wikipedia articles (New!) ▸ Words that often appear near guard dog ▸ Rhymes of guard dog ▸ Invented words related to guard dog