A hound is a type of dog that assists hunters by tracking or chasing the animal being hunted. It can be contrasted with the gun dog, which assists hunters by identifying the location of prey and/or recovers shot quarry.
There are three types of hound, with several breeds belonging to each type:
Sighthounds (also called gazehounds), which follow prey predominantly by speed, keeping it in sight. These dogs are very fast and will catch and kill game (e.g., hares, gazelles, deer) by themselves.