guard dog

or guard·dog


a large, aggressive dog, as a German shepherd or Doberman pinscher, trained to guard persons or property and often to attack or restrain on command.

Nearby words

  1. guaraní,
  2. guarapuava,
  3. guard,
  4. guard band,
  5. guard cell,
  6. guard duty,
  7. guard hair,
  8. guard of honor,
  9. guard pin,
  10. guard ring

Origin of guard dog

First recorded in 1790–1800 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019