dog - definition and synonyms

noun [countable] 

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  1. 1
    an animal kept as a pet, for guarding buildings, or for hunting. A young dog is called a puppy

    Have you fed the dog?

    Out on the street, a dog began to bark.

     Synonyms and related words
    1. a.
      a male dog or a male animal that belongs to the same group of animals as dogs, such as a male wolf or fox

      a dog fox

  2. 2
    offensive someone who is not attractive, especially a woman
     Synonyms and related words
  3. 3
    Australian informal someone who gives information about people to the police or to another authority
  4. 4
    mainly American informal something that is of bad quality or very unsuccessful

    I invested in an Internet start-up but it turned out to be a real dog.

  5.   From our crowdsourced Open Dictionary
    have a dog in a fight be represented in a conflict

    For those of us who want to change the European Union into a democratic Europe run in the interests of working people, we have no dog in this pathetic fight.

    Submitted from United Kingdom on 19/04/2016
  6.   From our crowdsourced Open Dictionary
    in a dog's age for a long time, the same as "for donkey's years"

    I haven't seen you in a dog's age

    Submitted by Oriel Villagarcia from Argentina on 06/03/2016