What is the meaning of sequester?

verb

• Requisition forcibly, as of enemy property.
  • usage: "the estate was sequestered"
• Take temporary possession of as a security, by legal authority.
  • usage: "The FBI seized the drugs"; "The customs agents impounded the illegal shipment"; "The police confiscated the stolen artwork"
  • synonyms: impound, attach, confiscate, seize
• Undergo sequestration by forming a stable compound with an ion.
  • usage: "The cations were sequestered"
• Keep away from others.
  • usage: "He sequestered himself in his study to write a book"
  • synonyms: seclude, sequestrate, withdraw
• Set apart from others.
  • usage: "The dentist sequesters the tooth he is working on"
  • synonyms: sequestrate, keep apart, set apart, isolate