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guard dog

guard dog

20 2.1
A dog trained to protect people or property by warning and sometimes attacking intruders
  • noun
  • /ɡɑrd dɔɡ/
translation icon : perro guardián
  • Twenty years ago, I started this company with two night watchmen and a guard dog, and now we have the chance to turn it into one of the largest privately-held corporate security firms in the country.
  • train guard dogs

And then this German shepherd guard dog that's obviously doing his job.

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Examples

  • I see you've met our guard dogs.

  • You want me to be your guard dog.

  • Well, if you wanna help me, get me a big guard dog or a gun.

  • "See why she needs a guard dog?" Jim asks.

    Fiction book (1992)
  • If I have an alarm system and guard dog, why should I pay for the cops to protect you?

    Blog text (11)
  • My dogs were professionally trained as guard dogs and are my best line of defense against a home invader.

    Blog text (14)
  • Trained guard dogs help protect the sheep from coyotes, bears, and other predators.

    Academic text (1995)
  • The guard dog barked loudly to alert the owner of an intruder.

  • Many homeowners choose a guard dog to protect their property from burglars.

  • A well-trained guard dog can deter potential threats with its barking.

Synonyms

watchdog
vsguard dog
9 3.1

A dog trained to guard a building and warn about strangers

includes protecting people as well and may warn or use force against intruders
attack dog
vsguard dog
8 4.1

A dog trained to attack or guard on command

offers broader guarding tasks and also warns rather than only acting on command

Antonyms

754 1.0

A person who takes someone else's things without permission

240 3.9

A person who enters a place without permission to steal or harm people

How Protective

attack dog
8 4.1
guard dog
20 2.1
watchdog
9 3.1

Surface Forms

guard dog singular
guard dogs plural

Morphology

guard + dog

The meaning 'a dog trained to protect property or people' is directly and transparently derived from combining 'guard' (one who protects) with 'dog' (a canine). This straightforward noun+noun composition is a common, cross-linguistic pattern, so a B1 learner who knows both constituent words will readily infer the MWE meaning.

Etymology

Guard dog is a dog whose job is to guard a home or property. Imagine it sitting at the gate, barking or attacking when a stranger comes near, so the phrase means 'to protect' people or things.