Sequester Definition

sequestered, sequestering, sequesters
sequestered, sequestering, sequesters
To set off or apart; separate; segregate; often, to segregate or isolate (the jury) during a trial.
Webster's New World
To remove or isolate (a chemical, often a gas) from an environment by incorporation, mixing, or insertion under pressure.
Plants that sequester toxins from wetlands; plans to sequester carbon dioxide produced by a power plant by injection into an underground aquifer.
American Heritage
To take over; confiscate; seize, esp. by authority.
Webster's New World
To take and hold (property) by judicial authority, for safekeeping or as security, until a legal dispute is resolved.
Webster's New World
To withdraw; seclude.
Webster's New World

(law) A person with whom two or more contending parties deposit the subject matter of the controversy; one who mediates between two parties; a referee.


(medicine) A sequestrum.

Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.

Origin of Sequester

  • Middle English sequestren from Old French from Latin sequestrāre to give up for safekeeping from Latin sequester depositary, trustee sekw-1 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Late Latin sequestrō (“set aside"), from Latin sequester (“mediator, trustee").

    From Wiktionary

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