A Bleed

1. An incident of bleeding, as in haemophilia.
2. (aviation, usually in the plural) A system for tapping hot, high-pressure air from a gas turbine engine for purposes such as cabin pressurization and airframe anti-icing.
3. (printing) A narrow edge around a page layout, to be printed but cut off afterwards (added to allow for slight misalignment, especially with pictures that should run to the edge of the finished sheet).
4. (sound recording) The situation where sound is picked up by a microphone from a source other than that which is intended.
5. The removal of air bubbles from a pipe containing other fluids.
6. (uncountable, role-playing games) The phenomenon of in character feelings affecting a player's feelings or actions outside of the game.