Wel ‧ by, Mar ‧ cus /ˈwelbi, ˈmɑːkəs $ ˈmɑːr-/ BrE AmE
the main character in the popular 1970s US television programme Marcus Welby M.D. People sometimes mention him as the perfect family doctor who cares about his ↑ patient s and always tries to help them with their problems.