verb

• (transitive) To continue in (a course or mode of action); to not intermit or fall from; to uphold or maintain.
  "to keep silence;  to keep possession"
• (transitive) To remain faithful to a given promise or word.
  "to keep one's word;  to keep one's promise"
• (transitive) To hold the status of something.
  "I keep a small stock of painkillers for emergencies."
• (transitive) To hold the status of something.
  "I keep my specimens under glass to protect them."

noun

• (historical) The main tower of a castle or fortress, located within the castle walls.
• (engineering) A cap for holding something, such as a journal box, in place.
• (obsolete) The act or office of keeping; custody; guard; care; heed; charge; notice.
  "So Sir Gareth strayned hym so that his olde wounde braste ayen on bledynge; but he was hote and corragyous and toke no kepe, but with his grete forse he strake downe the knyght[…]."
• (obsolete) That which is kept in charge; a charge.
  "Often he used of his keep / A sacrifice to bring."