Definition of "john" in English

noun

1. (slang, US) A prostitute's client.

   • In-calls, where the john comes to the prostitute’s residence, are prohibited.

2. (slang, US) A device or place to urinate and defecate: now usually a toilet or lavatory, but also (dated) a chamber pot or outhouse.

3. (slang) A Western man traveling in East Asia.

4. A male mule.