from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Something that assures a particular outcome or condition: Lack of interest is a guarantee of failure.
  • n. A promise or an assurance, especially one given in writing, that attests to the quality or durability of a product or service.
  • n. A pledge that something will be performed in a specified manner.
  • n. A guaranty by which one person assumes responsibility for paying another's debts or fulfilling another's responsibilities.
  • n. A guaranty for the execution, completion, or existence of something.
  • n. A guarantor.
  • transitive v. To assume responsibility for the debt, default, or miscarriage of.
  • transitive v. To assume responsibility for the quality or performance of: guarantee a product.
  • transitive v. To undertake to do, accomplish, or ensure (something) for another: guaranteed to free the captives; guarantees freedom of speech.
  • transitive v. To make certain: The rain guarantees a good crop this year.
  • transitive v. To furnish security for.
  • transitive v. To express or declare with conviction: I guarantee that you'll like this book.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Anything that assures a certain outcome.
  • n. A written declaration that a certain product will be fit for a purpose and work correctly.
  • n. A person who gives such a guarantee; a guarantor.
  • v. To assure that something will get done right.
  • v. To assume responsibility for a debt.
  • v. To make something certain.

from the GNU version of the Collaborative International Dictionary of English

  • n. In law and common usage: A promise to answer for the payment of some debt, or the performance of some duty, in case of the failure of another person, who is, in the first instance, liable to such payment or performance; an engagement which secures or insures another against a contingency; a warranty; a security. Same as guaranty.
  • n. One who binds himself to see an undertaking of another performed; a guarantor.
  • n. The person to whom a guaranty is made; -- the correlative of guarantor.
  • transitive v. In law and common usage: to undertake or engage for the payment of (a debt) or the performance of (a duty) by another person; to undertake to secure (a possession, right, claim, etc.) to another against a specified contingency, or in all events; to give a guarantee concerning; to engage, assure, or secure as a thing that may be depended on; to warrant.

from The Century Dictionary and Cyclopedia

  • To be warrant or surety for; secure as an effect or consequence; make sure or certain; warrant.
  • In law, to bind one's self that the obligation of another shall be performed, or that something affecting the right of the person in whose favor the guaranty is made shall be done or shall occur.
  • To undertake to secure to another, as claims, rights, or possessions; pledge one's self to uphold or maintain.
  • To engage to indemnify for or protect from injury: as, to guarantee one against loss.
  • n. A person to whom a guaranty is given: the correlative of guarantor.
  • n. One who binds himself to see the stipulations or obligations of another performed; in general, one who is responsible for the performance of some act, the truth of some statement, etc.
  • n. Same as guaranty.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. give surety or assume responsibility
  • v. make certain of
  • n. a written assurance that some product or service will be provided or will meet certain specifications
  • v. promise to do or accomplish
  • n. a collateral agreement to answer for the debt of another in case that person defaults
  • n. an unconditional commitment that something will happen or that something is true
  • v. stand behind and guarantee the quality, accuracy, or condition of


Alteration of Middle English garant, warranty, from Old French; see guaranty.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Old French guarantie (perhaps via a later Spanish garante), from the verb guarantir ("to protect, assure, vouch for"), ultimately from Old Frankish *warjand, *warand (“a warrant”), or from guaranty. Compare guaranty, warranty. (Wiktionary)


  • I plead now for the ballot, as the great guarantee; and _the only sufficient guarantee_ -- being in itself peacemaker, reconciler, schoolmaster and protector -- to which we are bound by every necessity and every reason; and I speak also for the good of the States lately in rebellion, as well as for the glory and safety of the Republic, that it may be an example to mankind.

    History of Woman Suffrage, Volume II

  • Asked about that, Mr. Kiely said his use of the term "guarantee" was "colloquial" and not meant within "the legal definition."

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  • Mr. Kasowitz, the lawyer for Fletcher, said the word guarantee referred to the fact that the pension fund would be a preferred investor, its return accrued before—and potentially taken from funds of—other investors.

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  • Mr. Kiely said in a statement to the Journal earlier this year that his use of the term "guarantee" in the email was "colloquial" and not meant within "the legal definition."

    Video Reveals Fletcher Fund's Claims

  • According to the reps that I meet with, the insurance guarantees serve as a useful marketing tool you can use the word guarantee at the closing table and provide client comfort in the form of principal protection.

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  • The state bar association and the Chicago real-estate board supported a Torrens system for Illinois; but there was bitter opposition, too; and the title guarantee companies were not happy to see a governmental competitor.

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  • Mr. Kasowitz, the lawyer for Fletcher, said the word guarantee referred to the fact that the pension fund would be a preferred investor, its return accrued before-and potentially taken from funds of-other investors. What's News US

  • Our lawyer made us change the word "guarantee" to "prioritize" because sometimes client work is client work.

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  • But, as PolitiFact points out, Mr. McConnell was only wrong in using the word "guarantee."

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  • Some securities lawyers say they counsel their clients not to use the word "guarantee" because markets can be unpredictable and guarantees can be problematic if investors are unable to fulfill them.

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