tube 1. (hardware) A CRT terminal. Never used in the mainstream sense of TV; real hackers don't watch TV, except for Loony Toons, Rocky & Bullwinkle, Trek Classic, the Simpsons, and the occasional cheesy old swashbuckler movie.
2. (electronics) electron tube. 3. (jargon) (IBM) To send a copy of something to someone else's terminal. "Tube me that note." [Jargon File] Last updated: 1996-02-05