Watson

American Heritage® Dictionary of the English Language, Fourth Edition

1. Watson, James Dewey Born 1928. American biologist who with Francis Crick proposed a spiral model, the double helix, for the molecular structure of DNA. He shared a 1962 Nobel Prize for advances in the study of genetics.
2. Watson, Thomas Augustus 1854-1934. American telephone pioneer who assisted Alexander Graham Bell in his experiments and was the leader of research and engineering for Bell Telephone Company (1877-1881).
3. Watson, Thomas John 1874-1956. American businessman who was president (1914-1949) and chairman (1949-1956) of International Business Machines.
4. Watson, Thomas Sturges Known as "Tom.” Born 1949. American golfer who in 1982 became one of only a few players to win the U.S. and British Open tournaments in the same year.

Wiktionary

1. n. A northern English and Scottish patronymic surname.
2. n. Doctor Watson, fictional character in, and narrator of the Sherlock Holmes stories
3. n. Any character who performs as catalyst for the protagonist detective's mental processes in a mystery story; a consciousness that's privy to facts in the case without being in on the conclusions drawn from them until the proper time. After William L. DeAndrea, discussing Sir Arthur Conan Doyle.
4. n. James D. Watson co-discoverer of the structure of DNA

WordNet 3.0

1. n. United States geneticist who (with Crick in 1953) helped discover the helical structure of DNA (born in 1928)
2. n. United States telephone engineer who assisted Alexander Graham Bell in his experiments (1854-1934)
3. n. United States psychologist considered the founder of behavioristic psychology (1878-1958)