[
Cyberpunk SF, refers to flattening of EEG traces upon
brain-death] also "flatlined". 1. To
die, terminate, or
fail, especially irreversibly. In hacker parlance, this is
used of machines only, human death being considered somewhat
too serious a matter to employ jargon-jokes about.
2. To go completely quiescent; said of machines undergoing
controlled shutdown. "You can suffer file damage if you shut
down Unix but power off before the system has gone flatline."
3. Of a video tube, to fail by losing vertical scan, so all
one sees is a bright horizontal line bisecting the screen.