sequester UK /sɪˈkwɛs.tə/US /sɪˈkwɛs.tɚ/verb 10noun 3forms 3 verb10 •To separate in order to store.The coal burning plant was ordered to sequester its CO₂ emissions. •To separate from all external influence; to seclude; to withdraw.The jury was sequestered from the press by the judge's order. •To withdraw; to retire. •To set apart; to put aside; to remove; to separate from other things.I had wholly sequestered my thoughts from civil affairs. — 1627 •(US) To remove (certain funds) automatically from a budget.The Budget Control Act of 2011 sequestered 1.2 trillion dollars over 10 years on January 2, 2013. •To temporarily remove (property) from the possession of its owner and hold it as security against legal claims. •To cause (one) to submit to the process of sequestration; to deprive (one) of one's estate, property, etc.It was his tailor and his cook, his fine fashions and his French ragouts, which sequestered him. — 1694 •To seize and hold enemy property. •To prevent an ion in solution from behaving normally by forming a coordination compound. •(old-fashioned) To renounce (as a widow may) any concern with the estate of her husband. noun3 •sequestration; separation •A sequestrum. •A person with whom two or more contending parties deposit the subject matter of the controversy; one who mediates between two parties; a referee formssequestered · sequestering · sequesters