A fictional English detective, created by Sir Arthur Conan Doyle. Holmes’s extraordinary powers of memory, observation, and deduction enable him to solve mysteries and identify criminals in cases that leave all other detectives baffled. His companion is Dr. Watson, who records his exploits. Holmes is often mistakenly quoted as saying, “Elementary, my dear Watson.”
Note Figuratively, any shrewd detective can be called Sherlock Holmes, or simply Sherlock.