What is the meaning of dog?

noun

• A member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds.
  • usage: "the dog barked all night"
  • synonyms: domestic dog, Canis familiaris
• A dull unattractive unpleasant girl or woman.
  • usage: "she got a reputation as a frump"; "she's a real dog"
  • synonyms: frump
• Informal term for a man.
  • usage: "you lucky dog"
• Someone who is morally reprehensible.
  • usage: "you dirty dog"
  • synonyms: cad, bounder, blackguard, hound, heel
• A smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll.
  • synonyms: frank, frankfurter, hotdog, hot dog, wiener, wienerwurst, weenie
• A hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward.
  • synonyms: pawl, detent, click
• Metal supports for logs in a fireplace.
  • usage: "the andirons were too hot to touch"
  • synonyms: andiron, firedog, dog-iron

verb

• Go after with the intent to catch.
  • usage: "The policeman chased the mugger down the alley"; "the dog chased the rabbit"
  • synonyms: chase, chase after, trail, tail, tag, give chase, go after, track