dropout

noun7

1. •
   Someone who has left an educational institution without completing the course

   • The politicians of the world are mere political university dropouts.
2. •
   Someone who has opted out of conventional society.
3. •
   One who suddenly leaves anything, or the act of doing so.

   • The pastures are filled with gay political drop-outs, persons of reasonable intent who found the scene personally destructive. — 1980
4. •
   A damaged portion of a tape or disk, causing a brief omission of audio, video, or data.
5. •
   Momentary loss of an electronic signal.
6. •
   A technique for regularizing a neural network by discarding a random subset of its units.
7. •
   The slot in the frame that accepts the axles of the wheels.