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noun, verb.
noun 1. a large, powerful dog with a keen sense of smell. Bloodhounds are used to track fugitives or find people who are lost. Though commonly described as fierce and vicious, bloodhounds actually are relatively gentle and placid.
2. (Slang, Figurative.) a detective.
△Ex. ... a nationwide manhunt led by a ruminative bloodhound from the FBI (Newsweek).
v.t., v.i. to track, hunt, or pursue as a bloodhound does.
△Ex. The FBI did not slip up on its ... trail of bloodhounding (New Scientist).