Definition of Lennon, John
- (1940–80), English pop and rock singer, guitarist, and songwriter; born John Winston Lennon. A founding member of the Beatles, he wrote most of their songs in collaboration with Paul McCartney. After the group broke up in 1970, he continued recording material, such as Imagine (1971), some with his second wife, Yoko Ono. He was fatally shot by a mentally disturbed fan outside his home in New York City.