Merriam-Webster Collegiate Dictionary - john

 noun  Etymology: from the name John  Date: 1856  1. probably short for ~ny, ~ny house privy toilet  2. a prostitute's client JOHN  I. noun  Etymology: Late Latin Johannes, from Greek Ioannes, from Hebrew Yohanan  Date: 12th century  1. a Jewish prophet who according to Gospel accounts foretold Jesus' messianic ministry and baptized him — called also ~ the Baptist  2. an apostle who according to various Christian traditions wrote the fourth Gospel, the three Johannine Epistles, and the Book of Revelation  3. the fourth Gospel in the New Testament — see bible table  4. any of three short didactic letters addressed to early Christians and included in the New Testament — see bible table  II. biographical name name of 21 popes: especially XXIII (Angelo Giuseppe Roncalli) 1881-1963 (pope 1958-63)  III. biographical name  1167-1216 ~ Lackland king of England (1199-1216)  IV. biographical name Augustus Edwin 1878-1961 British painter & etcher