- any of a breed of large dogs with a smooth coat, wrinkled face, drooping ears, and a keen sense of smell: bloodhounds are used in tracking escaped prisoners, fugitives, etc.
- a person who pursues keenly or relentlessly
Origin of bloodhoundMiddle English blodhond: see blood (noun) and hound
- A hound of a breed having a smooth coat, drooping ears, loose skin especially around the jowls, and a keen sense of smell.
- Informal A relentless pursuer.
From Middle English blodhound, blodhond, equivalent to blood + hound. Cognate with Dutch bloedhond (“bloodhound”), Middle Low German blōthunt (“bloodhound”), German Bluthund (“bloodhound”), Danish blodhund (“bloodhound”), Swedish blodhund (“bloodhound”). The detective sense follows from the dog's ability to follow a trail.