What does bloodhound mean?
A bloodhound is a large, powerful breed of dog famous above all for its extraordinary sense of smell. With its wrinkled face, loose skin, and long, drooping ears — features that help funnel and trap scent — it has been used for centuries to follow trails left by humans and animals alike. Unlike greyhounds, which hunt by sight, bloodhounds are scenthounds: they keep their noses to the ground and can persist on a trail long after other dogs would give up. This remarkable ability has made them valuable partners for police and search-and-rescue teams, and in some jurisdictions their identification of a trail carries legal weight. Beyond the literal dog, 'bloodhound' is widely used figuratively for any person who relentlessly tracks down facts, leads, wrongdoers, or bargains — an investigative reporter, an auditor, a bargain hunter. In this extended use the word suggests tenacity and sharp instinct rather than aggression, giving it a broadly admiring connotation.
A large breed of scenthound with a keen sense of smell, used for tracking.
"Rescuers brought in a bloodhound to search the dense forest for the missing hiker."
Lowercase in general prose; capitalized as a formal breed name.
Figuratively, a person who persistently hunts down information, targets, or opportunities.
"The veteran reporter was known as the paper's bloodhound, never letting go of a promising lead."
Informal register, typically complimentary.
Regular plural; identical for both the literal breed and the figurative sense.
"Two bloodhounds were brought in to sweep the perimeter for the escaped convict's trail."
A bloodhound's verdict on a scent trail is so trusted that in some US states its trailing evidence is legally admissible in court.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bloodhound
The word 'bloodhound' comes from Middle English, formed transparently from 'blood' + 'hound', and was recorded by the late medieval period. Its name does not refer to a taste for blood; scholars generally explain it as originally denoting a 'pure-blooded' or aristocratically bred hound, kept by nobles for hunting, before the breed became associated specifically with tracking wounded ('bloody') game. The compound is entirely English in formation, though the breed itself traces back to hounds of continental Europe, notably the St. Hubert hounds of medieval Belgium and France.
How bloodhound is actually used
In its literal sense the word names a specific AKC-recognized breed, so it is capitalized only when used as a formal breed name in kennel-club contexts; in ordinary prose it is lowercase. The figurative sense is informal but common in journalism, often hyphenated attributively (e.g. 'bloodhound instincts'). It carries strongly positive connotations of persistence and reliability rather than menace.
Easily confused with bloodhound
'Hound' is the broad term for any hunting dog of the dog family, while 'bloodhound' is one specific breed of hound prized for tracking by scent.
A greyhound is a slender, fast sighthound bred for racing by sight, whereas a bloodhound is a heavy-boned scenthound bred to track smells.