a large plane that can carry several hundred passengers, especially a Boeing 747 Topics Transport by airc1大型客机(尤指波音 747) Word Originearly 19th cent. (originally of a person): probably the second element of mumbo-jumbo. Originally denoting a large and clumsy person, the term became popular as the name of an elephant at London Zoo, which was sold in 1882 to the Barnum and Bailey circus.