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.
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Question 1 of 7
This tall, horizontally branched cactus is probably the most recognizable cactus in Arizona. What is it called?
Origin of guard dog
First recorded in1790–1800
Words nearby guard dog
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020