noun

• (computing) An instance of rebooting.
• (by extension) A fresh start.
  "That’s why we don’t just need a bailout. We need a reboot. We need a build out. We need a buildup. We need a national makeover."
• (narratology) The restarting of a series' storyline, discarding all previous continuity.
• (widely considered a misuse) The restarting of a series' storyline without discarding previous continuity.
  "HBO Max has issued a straight-to-series order for “Pretty Little Liars: Original Sin,” a reboot of the original Freeform series... “We’re such huge fans of what I. Marlene King and her iconic cast created, we knew that we had to treat the original series as #CANON""

verb

• (computing, ergative) To execute a computer's boot process, effectively resetting the computer and causing the operating system to reload, commonly after a system failure.
  "We need to reboot the system after installing these updates."
• (by extension) To start afresh.
  "They rebooted the TV series, but it's even worse than the original."