‖n. [ Braz. guará. ] (Zool.) (a) The scarlet ibis. See Ibis. (b) A large-maned wild dog of South America (Canis jubatus) -- named from its cry. [ 1913 Webster ]

‖n. [ Pg. ] (Med.) A preparation from the seeds of Paullinia sorbilis, a woody climber of Brazil, used in making an astringent drink, and also in the cure of headache. [ 1913 Webster ]

n. (Chem.) An alkaloid extracted from guarana. Same as Caffeine. [ 1913 Webster ]

v. t. [ imp. & p. p. guaranteed p, pr. & vb. n. Guaranteeing. ] [ From Guarantee, n. ] 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; as, to guarantee the execution of a treaty. [ 1913 Webster ]

The United States shall guarantee to every State in this Union a republican form of government. Constitution of the U. S. [ 1913 Webster ]

n.; pl. Guarantees [ For guaranty, prob. influenced by words like assignee, lessee, etc. See Guaranty, and cf. Warrantee. ] 1. 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. [ 1913 Webster ]

His interest seemed to be a guarantee for his zeal. Macaulay. [ 1913 Webster ]

2. One who binds himself to see an undertaking of another performed; a guarantor. South. [ 1913 Webster ]

☞ Guarantor is the correct form in this sense. [ 1913 Webster ]

3. (Law) The person to whom a guaranty is made; -- the correlative of guarantor.

Syn. -- Guarantee, Warranty. A guarantee is an engagement that a certain act will be done or not done in future. A warranty is an engagement as to the qualities or title of a thing at the time of the engagement. [ 1913 Webster ]

adj. 1. secured by written agreement.
Syn. -- bonded, secured, warranted. [ WordNet 1.5 ]

2. certified. [ WordNet 1.5 ]

n. [ See Guaranty, and cf. Warrantor. ] (Law) (a) One who makes or gives a guaranty; a warrantor; a surety. (b) One who engages to secure another in any right or possession. [ 1913 Webster ]

n.; pl. Guaranies [ OF. guarantie, garantie, F. garantie, OF. guarantir, garantir, to warrant, to guaranty, E. garantir, fr. OF. guarant, garant, a warranter, F. garant; of German origin, and from the same word as warranty. See Warrant, and cf. Warranty, Guarantee. ] In law and common usage: An undertaking to answer for the payment of some debt, or the performance of some contract or duty, of another, in case of the failure of such other to pay or perform; a guarantee; a warranty; a security. [ 1913 Webster ]

v. t. [ imp. & p. p. Guarantied p. pr. & vb. n. Guarantying. ] [ From Guaranty, n. ] In law and common usage: To undertake or engage that another person shall perform (what he has stipulated); to undertake to be answerable for (the debt or default of another); to engage to answer for the performance of (some promise or duty by another) in case of a failure by the latter to perform; to undertake to secure (something) to another, as in the case of a contingency. See Guarantee, v. t. [ 1913 Webster ]

☞ Guaranty agrees in form with warranty. Both guaranty and guarantee are well authorized by legal writers in the United States. The prevailing spelling, at least for the verb, is guarantee. [ 1913 Webster ]